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

No-Bake Peanut Butter Marshmallow Cereal Bars
Yield: one 8-by-8-inch pan, 9 to 12 squares

No-Bake Peanut Butter Marshmallow Cereal Bars

Prep Time 5 minutes
Cook Time 2 minutes
Additional Time 1 hour 53 minutes
Total Time 2 hours

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.

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)

Instructions

  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

Nutrition Information:

Yield:

12

Serving Size:

1

Amount Per Serving: Calories: 288Total Fat: 11gSaturated Fat: 2gTrans Fat: 0gUnsaturated Fat: 7gCholesterol: 0mgSodium: 182mgCarbohydrates: 45gFiber: 1gSugar: 32gProtein: 7g

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)

Peanut Chewy Payday Bars

Caramel and Chocolate Gooey Bars

Caramel and Chocolate Gooey Bars

Double Chocolate Caramel Corn & Cocoa Rice Krispies Candy Bars

Double Chocolate Caramel Corn & Cocoa Rice Krispies Candy Bars

Nutella and Peanut Butter Graham Bars with Chocolate Frosting

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

Browned Butter Rice Krispies Treats

Special K Bars

Special K Bars
Underside of Special K Bar
 

No-Bake Nutter Butter Special K Bars

No-Bake Nutter Butter Special K Bars

Peanut Butter Caramel Twix Bars (almost no-bake)

Peanut Butter Caramel Twix Bars

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?

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.