No-Bake Peanut Butter Marshmallow Cereal Bars

These bars are a hybrid of some of my favorite bars.

No-bake, ChewyGooey, Caramely, with Peanut Butter, Special K, Cereal, Marshmallows.

No-Bake Peanut Butter Marshmallow Cereal Bars - Easy 5-Minute Recipe at averiecooks.com

And they’re so good. And so easy.

Ever since I made the Chewy Peanut Butter and Chocolate Cereal Bars, I’ve been thinking about how to remake them in a slightly new way.

No-Bake Peanut Butter Marshmallow Cereal Bars - Easy 5-Minute Recipe at averiecooks.com

These bars are based heavily on those, but instead of using Rice Krispies, I used Special K. You could also use Corn Flakes, Frosted Flakes, Rice Krispies, or a similar vegan or gluten-free cereal.

Instead of topping them with chocolate-peanut butter swirls, I stirred in marshmallows. I love marshmallows in bars because they lend so much gooey-and-chewy texture.

Plus, marshmallows are more well-behaved in the Caribbean heat and don’t melt everywhere like chocolate.

No-Bake Peanut Butter Marshmallow Cereal Bars - Easy 5-Minute Recipe at averiecooks.com

No-bake bars like these are always nice so you don’t have to heat up your house, especially this time of year.

And they’re made in one bowl in the microwave, and take less than 5 minutes to stir together. Usually it’s the fast and easy recipes people seem to make anyway, and you can add this one to the Fast and Easy list.

No-Bake Peanut Butter Marshmallow Cereal Bars - Easy 5-Minute Recipe at averiecooks.com

There’s no butter in the recipe, but you’d never guess it because they’re exceedingly buttery-tasting and rich.

The microwave-made sauce drenches the cereal in a sweet, brown sugary, caramel-vanilla, peanut buttery syrup and holds the bars together.

No-Bake Peanut Butter Marshmallow Cereal Bars - Easy 5-Minute Recipe at averiecooks.com

I love bars that I can really sink my teeth into, and these deliver.

They’re dense, wonderfully soft, with tons of chewiness and texture from the cereal and marshmallows.

No-Bake Peanut Butter Marshmallow Cereal Bars - Easy 5-Minute Recipe at averiecooks.com

Peanut butter has a way of making everything taste so good and decadent.

Even Special K.

No-Bake Peanut Butter Marshmallow Cereal Bars - Easy 5-Minute Recipe at averiecooks.com

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No-Bake Peanut Butter Marshmallow Cereal Bars

These fast, easy, no-bake bars are a hybrid of some of my favorite bars, which include peanut butter, marshmallows, cereal and are held together with a brown sugar-caramel sauce that's made in the micro in 1 bowl. They're dense, wonderfully soft, with plenty of chewiness and texture and you can really sink your teeth into them. There's no butter in the recipe, but you won't miss it because the bars are rich and very buttery tasting.

Yield: one 8-by-8-inch pan, 9 to 12 squares

Prep Time: 5 minutes

Cook Time: 2 minutes, microwave

Total Time: 2 hours, for chilling

Ingredients:

1 heaping cup creamy peanut butter (use Jif, Skippy, or similar; do not use natural or homemade peanut butter)
1/2 cup light corn syrup (light colored, not lite)
1/2 cup granulated sugar
1/4 cup light brown sugar, packed
1 tablespoon vanilla extract
3 1/2 cups Special K cereal (Corn Flakes may be subsituted, or use about 3 cups Rice Krispies cereal)
about 5 ounces marshmallows (half of one standard bag; I used large but mini are ideal)

Directions:

  1. Line an 8-inch square pan with aluminum foil leaving overhang, spray with cooking spray; set aside.
  2. In a large microwave-safe bowl, combine 1 heaping cup peanut butter, corn syrup, sugars, and heat on high power for 1 minute to melt.
  3. Stop to stir. Mixture will be on the granular side, this is okay.
  4. Return bowl to microwave and heat for 1 more minute on high power.
  5. Stir in the vanilla.
  6. Stir in the cereal and marshmallows. The marshmallows will melt to some extent, but not fully.
  7. Turn mixture out into prepared pan, packing it down somewhat firmly with a spatula, and smooth the top.
  8. Cover pan with a sheet of foil (to prevent fridge smells), and place pan in fridge to set up for about 2 hours or until set, before lifting out with foil overhang, slicing, and serving.
  9. Bars will keep airtight at room temperature for up to 1 week, in the refrigerator for up to 2 weeks, or in the freezer for up to 6 months.

Adapted from Chewy Peanut Butter and Chocolate Cereal Bars

Recipe from Averie Cooks. All images and content are copyright protected. Please do not use my images without prior permission. If you want to republish this recipe, please re-write the recipe in your own words, or simply link back to this post for the recipe. Thank you.

Related Recipes:

Chewy Peanut Butter and Chocolate Cereal Bars (no-bake, vegan, GF)

Chewy Peanut Butter and Chocolate Cereal Bars (vegan, gluten-free) - Recipe at averiecooks.com

Peanut Chewy Payday Bars (almost no-bake)

Caramel and Chocolate Gooey Bars

Double Chocolate Caramel Corn & Cocoa Rice Krispies Candy Bars

Nutella and Peanut Butter Graham Bars with Chocolate Frosting

Browned Butter Rice Krispies Treats – The best RKTs I have ever had. Double the butter and it’s browned, for great flavor and soft, buttery, chewy bars

Special K Bars

No-Bake Nutter Butter Special K Bars

Peanut Butter Caramel Twix Bars (almost no-bake)

Peanut Butter Chocolate Chunk Cookie Bars

Nutella-Swirled Peanut Butter Chip Blondies

Nutella-Swirled Peanut Butter Chip Blondies - Easy One-Bowl No-Mixer Recipe at averiecooks.com

Biscoff Marshmallow Chocolate Bars

Biscoff Marshmallow Chocolate Bars from averiecooks.com

Marshmallow Caramel Oreo Cookie S’Mores Bars

Marshmallow Caramel Oreo Cookie S’Mores Bars

 Thanks for the entries in the 3-Piece Baking Set and Gluten-Free Dough Giveaway and the $100 My Sweet Muffin Giveaway

What’s your favorite no-bake or fast and easy dessert?

   

65 Responses to “No-Bake Peanut Butter Marshmallow Cereal Bars”

  1. #
    1
    Madison — August 11, 2013 at 4:45 am

    These look so amazing! I love that you added the marshmallows. That totally takes these into over-the-top awesomeness! :)

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 8:28 am

      Thanks and I agree with the over the top part :)

      Reply

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    Belinda @themoonblushbaker — August 11, 2013 at 4:53 am

    I love bar like this. They are honestly the one thing I eat by my self because I am too ashamed to admit I still love them at 21… Eh.. more for me.
    PB and marshmallow? Heaven in a portable snack!

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 8:28 am

      You’re never too old for bars like these! They are just so good!

      Reply

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    Paula — August 11, 2013 at 5:09 am

    I love a gooey bar–and no bake cereal bars and cheesecake taste good any time of year, but especially in the summer. My most frequently made fast summer dessert is throwing frozen stuff into the vita for instant sorbets or ice cream. Hmmm….I think a little coconut milk ice cream or banana soft serve might be good on top of these too!

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 8:28 am

      Funny I am just getting ready to make a version of banana softserve. I haven’t quite decided what’s going into the blender yet though!

      Reply

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    movita beaucoup — August 11, 2013 at 5:09 am

    Gawd, I love reading the phrase “do not use natural or homemade peanut butter.”

    Almost as much as “does not contain raisins.”

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 8:27 am

      There are times for natural PB and then there are times for Jif, Skippy, or Peter Pan. They are like glue and work WONDERS here whereas natural is like a soft oil slick and not really ideal :)

      Reply

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    Laura Dembowski — August 11, 2013 at 5:20 am

    Something very similar to these is actually on the menu for this morning. I love peanut butter no bake treats like this and adding marshmallows was a great idea!

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 8:26 am

      Your morning sounds like it’s off to a great start!

      Reply

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    Katrina @ Warm Vanilla Sugar — August 11, 2013 at 5:21 am

    Cereal bars like this are the best! I’m so happy you made these – they sound delicious!

    Reply

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    Tieghan — August 11, 2013 at 5:35 am

    I love this spin on the special K-Bar!! Special K- BArs are my family favorite and these look like they could compete! WOW oh wow! I love all that gooeyness on top and the peanut butter. YUM!!

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 8:26 am

      I know you have a recipe for them, too! My Special K bar recipe is from 2010 so I figured it could use a little updating. Then again, it was my grandma’s recipe from like 1960 and has served us very well :)

      Reply

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    8
    Stephanie @ Eat My Tortes — August 11, 2013 at 6:50 am

    Oh goodness! I have all of the ingredients to make these right now. These are going to be pretty dangerous to have around, but I’m betting they’re totally worth it! thank you for sharing :)

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 8:24 am

      TOTALLY worth it! Loved them! Enjoy :) LMK how they turn out!

      Reply

  9. #
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    Laura @ Lauras Baking Talent — August 11, 2013 at 7:31 am

    I love trying new no bake bars. What a good idea to use Special K cereal!

    Reply

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    Angie | Big Bear's Wife — August 11, 2013 at 8:11 am

    no bake bars are my favorite to make. So easy to come together too!

    Reply

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    Ruthy @ Omeletta — August 11, 2013 at 8:25 am

    You had me at “peanut butter”, “marshmallow” and “no bake”. In other words, the entire thing! Delicious!

    Reply

  12. #
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    Eileen — August 11, 2013 at 8:32 am

    These look quite delicious too me. And no baking – perfect!

    Reply

  13. #
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    Valerie — August 11, 2013 at 8:53 am

    Since these bars are made with Special K that means they’re healthy, right? So it’s okay to enjoy several… :D

    I love your hybrid creations!

    Reply

  14. #
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    Pamela @ Brooklyn Farm Girl — August 11, 2013 at 9:20 am

    I love how much you love peanut butter. And no bake – even better! Thanks for these!

    Reply

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    Christy@SweetandSavoring — August 11, 2013 at 11:39 am

    So mouth watering, Averie! I love how you take those extra steps like cutting squares of parchment paper for each bar :)
    Lately I’ve been making an easy dessert in the food processor of banana ice cream with frozen banana, peanut butter, bits of chopped TJ’s dark chocolate, and some vanilla extract.

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 12:47 pm

      I do it b/c it looks nice but really, b/c things melt here in the heat and I don’t want the gooey stuff melting and sticking to my wood table. In San Diego it’s not an issue but here in Aruba, hot, humid, sticky city :) But thanks for noticing (b/c it’s a total pain and does take time! lol) Your easy dessert sounds wonderful!

      Reply

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    Maggie @ Sunnyside Up Smile — August 11, 2013 at 11:46 am

    Ahhh Averie! I love that you combined 3 of my favorite things- peanut butter, marshmallows and convenience! Lol ;) I’m in love with no-bake bars and they’re especially good when they’re dense and chewy like these. I’ve been wanting to experiment with no-bake bars lately….just haven’t gotten around with it. I’m thinking something with oats/oat flour and almond butter as the main components. Maybe a little coconut oil too ;) I’ll let you know if I get a chance to make these! Happy Sunday!

    Reply

  17. #
    17
    Stephanie @ Back For Seconds — August 11, 2013 at 12:50 pm

    These look great and I love how versatile they can be just by mixing up the type of cereal you use! Yum!

    Reply

  18. #
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    Katie — August 11, 2013 at 2:31 pm

    I need more bars in my life. And marshmallows. And peanut butter.

    I guess I need these, huh?

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 5:57 pm

      Texture lover’s dream and m’mallows, PB, brown sugar, they are sooooo good! And so MN :)

      Reply

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    19
    vanillasugarblog — August 11, 2013 at 4:41 pm

    Some of my best creations come from experimenting with my old “hybrid” recipes.
    So, yeah, keep going. LOL

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 5:56 pm

      As bloggers we have to keep things fresh but I tell you, if I didn’t blog, there are certain desserts I’d make over and over and over and never change one thing to them :)

      Reply

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    sally @ sallys baking addiction — August 11, 2013 at 5:32 pm

    Averie I am loving these! I am all about no-baking lately because quite frankly – I don’t want to turn on my oven! When we were at the lake, there were SO many of us that I just decided to make no-bake pies instead of cake for Kevin’s birthday. The house was already so hot from everyone inside it! Anyway, these bars are just glorious. I love marshmallow and PB together. These look like a texture lovers dream!

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 5:55 pm

      Nobake pies sound great. You are the queen of all those anyway with so many on your site I’ve always wanted to try! And PB + brown sugar (which turns to caramel in the micro) + m’mallows is so good. And they ARE indeed a texture lover’s dream!

      Reply

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    Gloria @ Simply Gloria — August 11, 2013 at 5:39 pm

    I can’t believe there’s no butter in these…I would never have guessed! I love how ooey gooey they are! These could be dangerous around the house… but that’s just how I live– on the edge of danger… with lots of sugar!

    Reply

    • Averie Sunshine replied: — August 11th, 2013 at 5:53 pm

      No butter and I am all about living on your kind of edge and danger as well :)

      Reply

  22. #
    22
    Dorothy @ Crazy for Crust — August 11, 2013 at 6:01 pm

    Mmm! I can almost taste the gooey sweetness of these bars! I need to make bars like this more often. I forget how good they are! (And how versatile other cereal is, besides rice krispies!)

    Reply

  23. #
    23
    Lara Laverne — August 11, 2013 at 8:13 pm

    Yes love this. I would never have thought of this. Might try them with Rice Krispies. Thanks for a great recipe :)

    Reply

    • Averie Sunshine replied: — August 12th, 2013 at 8:14 am

      And this was the version I made with Rice Krispies. So good too!

      Reply

  24. #
    24
    Eva @ Eva Bakes — August 11, 2013 at 9:25 pm

    These sound wonderful, Averie! No bake desserts are great this time of year!

    Reply

  25. #
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    Laura (Tutti Dolci) — August 11, 2013 at 10:22 pm

    The chewiness and texture of these sounds amazing!

    Reply

  26. #
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    Chung-Ah | Damn Delicious — August 12, 2013 at 12:22 am

    I absolutely love these hybrid bars! And I bet that added cereal brings in so much crunch!

    Reply

  27. #
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    Jamie@Milk N Cookies — August 12, 2013 at 3:22 am

    I LOVE, LOVE, LOVE peanut butter. I generally don’t buy it simply because I have no self control when it comes to the stuff. But I might have to make an exception and get some PB so I can try these bars. I especially like that they are no-bake so I don’ t have to heat up my kitchen on a hot summer’s day. Thanks for the inspiration!

    Reply

  28. #
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    Colleen @ What's Baking in the Barbershop?! — August 12, 2013 at 4:24 am

    I love how chewy, ooey, and gooey these looks! I haven’t baked with marshmallows in a while but I do have some in the cupboard… Hmmmm. Making these bars may just have to go on the to-do list this week. ;)

    Reply

    • Averie Sunshine replied: — August 12th, 2013 at 8:15 am

      You will LOVE them. So easy too :)

      Reply

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    Katie @ running4cupcakes — August 12, 2013 at 5:58 am

    What an awesome twist on the typical Special K bar!! Can’t wait to try these out. :)

    Reply

    • Averie Sunshine replied: — August 12th, 2013 at 8:15 am

      Thanks for stopping by and checking them out! It’s such a MN type of bar :)

      Reply

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    Kayle (The Cooking Actress) — August 12, 2013 at 6:22 am

    FAB! I loved that you used Special K-and just wonderful pb marshmallowy goodness. Hooray!

    Reply

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    Liz (Little Bitty Bakes) — August 12, 2013 at 7:04 am

    The world needs more no bake recipes in the month of August. :) These look amazingly chewy, Averie! I’m loving the addition of marshmallows. Like sprinkles, I think marshmallows can do no wrong. :)

    Reply

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    Heather (Where's the Beach) — August 12, 2013 at 7:40 am

    It’s hard to beat really easy cereal bars like this – especially when PB is involved!

    Reply

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    Tracy | PeanutButter and Onion — August 12, 2013 at 7:43 am

    you had me at No-Bake

    Reply

  34. #
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    Meagan @ Scarletta Bakes — August 12, 2013 at 12:18 pm

    Omigosh, do I love these! They honestly sound like the food equivalent of a big, fat hug. I mean cereal, marshmallows and peanut butter? I can’t think of a more comforting combination. Top it off with ‘no-bake’ and this is like hours of hugging it out. Perfect for lazy, hot, late summer days, Averie!

    Reply

    • Averie Sunshine replied: — August 12th, 2013 at 1:39 pm

      “the food equivalent of a big, fat hug” = YES, so true! Perfect way to say it! They are indeed!

      Reply

  35. #
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    Caralyn @ glutenfreehappytummy — August 12, 2013 at 2:06 pm

    no bake is PERFECT:) as are these bars!

    Reply

  36. #
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    Marta@What should I eat for breakfast today — August 12, 2013 at 3:26 pm

    You always have such an interesting ideas for cookies and bars. Mushmellows in this one must taste great.

    Reply

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    kim — August 13, 2013 at 8:24 pm

    hardly made it into the pan! could not stop eating from bowl! my new favorite!!! thank you!

    Reply

  38. #
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    Trisha — August 16, 2013 at 9:39 pm

    Just what I’m looking for. I’m stuck with no oven for a while and I’m so glad I came across these beauties. Stopping by from Tuesday Talent Show!

    Reply

    • Averie Sunshine replied: — August 17th, 2013 at 4:01 pm

      Oh thanks for clicking over and yes, no bake bars to the rescue (especially this time of year!) There are lots of related recipe links in the post too that are no-bake bars and goodies!

      Reply

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    Nutmeg Nanny — August 21, 2013 at 8:58 pm

    I am such a no bake lover :) these bars look heavenly!!

    Reply

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    Frenchy Elsa — September 18, 2013 at 1:50 pm

    I need some help, in France we don’t have your “corn syrup”, so what can I put in the receipe instead of it? thx

    Reply

    • Averie Sunshine replied: — September 18th, 2013 at 1:53 pm

      Possibly golden syrup or honey? I don’t know because I haven’t tried them if they will work exactly, but it would be a good start.

      Reply

      • Frenchy Elsa replied: — September 18th, 2013 at 2:10 pm

        thx! we’ve got maple syrup here, it could be the same, no?

      • Frenchy Elsa replied: — September 19th, 2013 at 12:46 pm

        done! it’s such… hmmmmmmmmmm! i tried the peanut butter bar with chocolate and cereal, really easy, fast and so good! thx for these ideas!

        • Averie Sunshine replied: — September 19th, 2013 at 12:49 pm

          Glad you like them and they worked so well for you!

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    Pixel Jo — September 25, 2013 at 4:50 am

    These look great! I love bars made with cereal – it always adds that crunch that I love so much. I do have a question, though. Out of curiosity, what happens if you use natural or homemade peanut butter?

    Can’t wait to try these!!!

    Reply

    • Averie Sunshine replied: — September 25th, 2013 at 4:52 am

      it may separate and your bars may fall apart…

      Reply

      • Pixel Jo replied: — September 25th, 2013 at 5:18 am

        that makes a lot of sense, now that I think about it. Thanks for the quick response!

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