Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting


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Happy Birthday to me.

Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting

Kidding. It’s not my birthday.

It’s the 100th birthday of Oreo Cookies.

Birthday cake oreo cookies bag

I had to jump on the Birthday Cake Oreo Cookie bandwagon, and what better way to eat chocolate-and-frosting sandwich cookies than to stuff them inside chocolate brownies and top the entire chocolatey mess with frosting.

Cookies on their own are good, but stuffed inside brownies, they’re even better.

Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting

I’m not alone in the Birthday Oreo baking bonanza because recently, I’ve seen:

Christi made these brownies

Bridget made these brownies

Liz made cookies

Katrina made ice cream cakes

The major difference I notice with the Birthday Cake Oreos compared to regular Oreos is that they smell like birthday cake. Yum.

But they don’t really taste like cake. I wish they tasted how they smelled, which is positively divine.

Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting and oreos

That’s okay because brownies make up for the lack of a strong cake flavor.

Chocolate remedies everything.

Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting

I also noticed that the Birthday Cake Oreos are slightly sweeter than regular Oreos, but not by much.

If you can’t find Birthday Oreos, or in the future when these special limited edition Oreos won’t be around, no worries. Just use the old standby original Oreo.

Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting

Whatever you use, when you’re stuffing cookies inside brownies, you’re going to be happy.

And topped with a thick layer of vanilla buttercream frosting, you’re going to be even happier.

Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting


Birthday Cake Oreo Cookie-Stuffed Brownies with Vanilla Buttercream Frosting and Sprinkles

Makes 24 brownies

Notes: If desired, use a boxed brownie mix, and prepare as indicated; pouring half the batter into the pan, topping with Oreos, and pouring remaining batter over the top of them. Bake as directed, but I would suggest a 25-30 minute guideline. Use storebought frosting if desired. If you cannot find Birthday Oreos, use any desired Oreo variety.

4 ounces baking chocolate (I used 10 squares of TJ’s 72% chocolate bar or use 4 squares Baker’s Chocolate, semi-sweet)

3/4 cup butter or margarine, melted (1 1/2 sticks)

2 cups sugar

3 eggs

1 teaspoon vanilla extract

2 tablespoons espresso or brewed coffee, optional

1 cup all-purpose flour

1/4 cup sprinkles, optional

15 Birthday Oreo Cookies (or Original Oreos)

Preheat oven to 350°F. Line a 9×13-inch pan with foil and spray it with cooking spray. Microwave chocolate and butter in large microwave-safe bowl for 90 seconds or until butter is melted. Stir until chocolate is completely melted. Stir in sugar (it will seem very granular, this is okay). Stir in eggs and vanilla. If adding espresso or coffee, add it now. Stir in flour until just combined, do not overmix. Stir in sprinkles if using. Spread half the brownie batter in prepared pan. Place Oreos on top of brownie batter (I did 3 across by 5 rows = 15 Oreos). Top with the remaining brownie batter and smooth it over the top, very slightly pushing the Oreos down with your spatula, very lightly. Bake 26 to 30 minutes or until brownies are set, taking care not to overbake. (Insert a toothpick into the center of the pan, and avoid inserting it into an Oreo, to check for doneness. Toothpick may not come out entirely clean even when done because these are very fudgy brownies). Note the brownies may “puff up” quite dramatically in their final minutes of cooking and this is okay. Let them cool completely, about 1 hour, or put the pan into the freezer for 10 minutes if you’re rushed before frosting, slicing, and serving. While brownies are cooling, make frosting (or use storebought)

Vanilla Buttercream Frosting (adapted from the C&H Cane Sugar box)

1 pound (1 box) powdered sugar (about 4 cups)

1/2 cup butter, softened

1/4 cup cream (or half-and-half, or milk)

1 teaspoon vanilla extract (use clear vanilla to keep your frosting extra white if this matters to you)

1/4 teaspoon Bright White Soft Gel Paste, optional (discussed here)

Mix until very smooth. (You may need to play with the cream and/or powdered sugar ratio very slightly while mixing the frosting until your preferred frosting consistency is reached). Frost the brownies and garnish with more sprinkles, as desired.


Getting to the point where you can chomp into one of these is easy.

Just make the brownie batter from scratch because it only takes 5 minutes, but if you really want to use a boxed mix, use that and mix it according to the directions (plus I’d add 2 tablespoons of coffee and a dash of vanilla extract).

Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting

Pour half the batter into the pan. Use foil so you can just lift this whole 6.743 pounds of brownie-cookie-frosting mixture out with ease. It’s so much easier that way and less messy and less chance of wasting chocolate at the bottom of a pan.

Birthday cake oreos on batter

Crack open a package of Oreos. Birthday Oreos are fun, but any Oreo will do and top the brownies with Oreos. I used 15 but you could have used less, or more, depending on how ridiculous delicious you want these brownies to be.

Birthday cake oreos

Pour the rest of the brownie batter over the top and use a spatula to smooth the top. I suggest lighting smooshing the Oreos down some with your spatula so they “embed” into the bottom layer but don’t smoosh too much that they “bottom out”.

Cake batter in pan

Bake for at least 26 minutes and start checking them at that point. Baking times could vary based on how many Oreos uses, oven temperature variances, if you made brownies from scratch or not, how halfway raw very gooey you like your brownies, and so forth. Use the toothpick test and common sense but know that a toothpick may not come out perfectly clean because these are very fudgy brownies. Also watch the edges and if they’re pulling away from the sides of the pan and foil, that’s a very good sign these babies are ready.

Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting

If you’re a brownie fan:

Peanut Butter Cup Brownie Cupcakes with White Chocolate Icing

Peanut Butter Cup Brownie Cupcake
Peanut Butter Cup Brownie Cupcakes with White Chocolate Icing
Peanut Butter Cup Brownie Cupcake with White Chocolate Icing

Fudgy Nutella Brownies with Cream Cheese Frosting

Fudgy Nutella Brownies with Cream Cheese Frosting

Triple Layer Fudgy Mint Oreo Brownies

Triple Layer Fudgy Mint Oreo Brownies

Happy Birthday, Oreo!

Oreo Cookie Stuffed Brownies with Vanilla Buttercream Frosting

Do you like Oreo Cookies?

How do you eat them?

I love them and can do major damage with a box of them. I eat them strategically by first breaking apart the two halves, and I eat the unfrosted cookie half first, getting the boring side out of the way, first.  Then I eat the half with the frosting on it and sometimes first by licking the frosting off and after that’s gone, I finish the cookie. By this point, my hands are covered in black crumbs, I have hypersweet frosting fragments stuck in my front teeth, and I’m ready to do it again with the next cookie.

Thanks for the Digital Kitchen Scale & Nutritionist Consultation Giveaway entries

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Welcome to AverieCooks! Here you’ll find fast and easy recipes that taste amazing and are geared for real life. Nothing fussy or complicated, just awesome tasting dishes everyone loves!

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  1. Hello, i would like to make this recipe plus the one with mini twix bars etc.for a kindergarten party where each parent brings something. Thing is due to COVID safety guidelines, we have to wrap every portion individually. How would you recommend i wrap the pieces and how much earlier before? Would Sara wrap work? The previous night would be ok to keep them fresh and not destroy them? Any suggestion would be welcome!
    Maria from Greece

    1. Wrapping anything that is frosted is difficult because the frosting gets stuck to the saran wrap or whatever you use.

      https://www.averiecooks.com/category/dessert/brownies/ Take a look there, there are lots of options that wouldn’t be so sticky such as the Loaded Cream Cheese Oreo Brownies, Texas Sheet Cake Brownies, Peanut Butter Brookies, Oreo Cream Cheese Brownies, and more.

      If it’s for a kindergarten party, I suggest something less rich and decadent like the peanut butter brookies or a basic blondies/bar recipe most of which aren’t frosted. https://www.averiecooks.com/tag/blondies-2/

      Wrap in saran wrap the night before.

  2. Hi Averie, I just made these for my daughter’s cast party. She’s in Romeo & Juliet at The Dancing Goat Theater near Atlanta, GA. I found them hard to cut because of the whole oreo inside. Any tips on cutting them? Also, did you refrigerate them before slicing or not. Just curious. Thanks and I love your site. :)

    1. Hi Lise, I got your email as well, thank you :)

      I really don’t have trouble cutting them either cold or room temp b/c I always lift the entire batch of anything I make out by the foil overhang, place the whole slab on a cutting board, then can just chop through it (cleaver-style), with a very sharp knife. I would lift out and place on a cutting board rather than trying to cut it in the pan AND make sure you’re using a razor-sharp knife.

  3. I know this is an old blog post but these look AMAZING and I’m going to make them for Superbowl! I used these birthday cake Oreos to make Oreo pops for my son’s birthday a few weeks ago and they were a huge hit! Thanks for the idea!

  4. Long before cookies & cream ice cream, I was breaking up my oreos & mixing them with vanilla ice cream as often as my mother would let me! Though I don’t do that anymore, I still enjoy the occasional oreo every now & then. But I will try this recipe :-)

  5. I just bought these oreo’s yesterday and they are so good! I agree that the cake like smell is slightly more than the actual flavor in the filling, but I could definitely tell the difference. While I wasn’t paying attention my fiance ate most of the package so it looks like I will have to purchase another package to make these brownies, lol.

  6. mmmmmmmmm I’m dying to go home and bake now.

    I did brownies last week for some friends but they were just plain ole ones.

    OH MY!

  7. I’ve yet to try to oreos stuffed in a brownie thing for fear of passing out from immediate ecstacy. Adding frosting and funfetti? I’ll definitely need a team standing by to revive me and feed me more.

  8. Oh yes please! Those look incredibly SWEET!!! So, when I was a teenager, I would grab an entire box of Oreos (sometimes the grasshopper ones – ever seen those? Are they even around anymore?) and eat the whole thing while mowing the lawn! It was one of those riding lawnmowers! Ahhhh…the teenage years! Haha! :-)

    1. Ok they’re sweet but they’re more rich, heavy, decadent than sweet.

      Mowing the lawn..omg memories. I would drink Mountain Dew and listen to my Walkman.

  9. Wow – that is quite the title and recipe :-) Looks good! I like oreos only if they are baked into something or dipped in milk so they get a bit soggy.

  10. Thank you for the mention, Averie! The brownies you did look awesome. If only we could have had a little swap party :)

    Funny, I told my mom, I wish I could bottle up the birthday cake Oreo smell in a fun lotion or something. It’s so yummy!

    1. There’s a body spray I have that is called Marshmallow Frosting or Whipped Frosting…I get it at Rite-Aid. It pretty much smells like cake batter and I love it :) Victoria’s Secret makes one, too, in their Candy Baby line of scents (they separate into “oil” and “water” until you shake them…they’re a cotton candy one or similar that’s pretty close to cake batter!)

  11. I love these Averie! I still have some leftovers after making my ice cream and brownies are definitely a good way to use the rest up, especially when there’s vanilla buttercream involved too!

  12. These look awesome! I love Oreo’s and had exactly 3 in my school lunches each day ages 6-16/17 or alternately 3 Fudgeeo’s (are these Canadian? they are so amazingly good.. I like ’em better than Oreo’s, actually!!…and now i am seriously craving them :) I also in recent years have been all about Golden Oreos!!! SO yummy and vanilla-ey. I’m a packaged cookie fan!!
    Oh and i break it in 2, eat one half sandwich style and do the licking then dunking with the other half. And then on to the next one (..or two, or three..)

    1. Golden Oreos…have only had those once, ages ago, and I need to pick those up again!

  13. I love Oreos! These look so good. They just made it to the top of my baking list. :)

  14. Oh my GOODNESS. These look brilliant. I will have to try them sometime after Lent is over (and that will give me time to figure out how to vegan-ize them!). Seriously, these look amazing and are something I don’t think I ever would have come up with on my own. They are being added to my list of desserts to make, along with those mint-Oreo creations you posted about a few days ago. Drool…..

    1. They’re really not that hard to veganize. Did you know that Oreos are “accidentally vegan”? Google that and a list will pop up. Same with Ritz crackers. Other than that, just make vegan brownies and vegan cream cheese frosting or vegan buttercream/earthbalance frosting and you’re there. Really an easy one to veganize!

      1. Oh yes, I know Oreos are veagn (at least most flavors are). When I first became a vegan (1995), they were not vegan; I think they had whey or something in them. A few years ago the recipe changed and they are now vegan. It was wonderful to be able to re-introduce such a mainstream snack back into my life :)
        I think this recipe will be reasonably easy to veganize, as you say; I can make vegan brownies and frosting without a problem. I’m not so sure about how to veganize the minty brownies you made, but I might try making them using whipped silken tofu as a base for the filling (there is nowhere near me that sells vegan marshmellow or fluff…..even our Whole Foods, which is an hour away, doesn’t have either one – grr!). I think silken tofu + confectioners’ sugar/maple or agave syrup + a little oil, in the blender for a few minutes, might do the trick. I’ll try it, at least!
        By the way, I LOVE your blog. I stumbled across it months ago and tried your vegan minty-chocolate bars and I’ve been hooked ever since.

      2. you could probably make a really thick and sweetened/mint version of cashew cream for the green part.

        Thanks for reading and sticking around!

  15. I unscrew the Oreos (preferably double stuff) and eat the middle first. I’ll definitely have to exercise a lot of restraint to execute your recipe properly! Those really look good–and the frosting on top gives it kind of a black and white checkered layer look. Love it! The triple layer mint Oreo brownies were a huge hit in this house last weekend!!

  16. I was about to be like, ooooo Happy Birthday! But then i read the second line :) haha. At least I can say happy birthday to oreo :). These look insane Averie! Sooooo delicious!

  17. Oh my…. glorious looking indulging goodies. I love the pics! And those peanut butter cup brownies look amazing too xo

    1. And I am surprised you haven’t jumped on the Oreo Bday bandwagon but you may still have some tricks up your sleeve. I love ALL your goodies…seriously…you are my baking hero!!! :)

  18. What a great way to celebrate Oreo’s 100th birthday – – pretty fine looking cookie for turning 100 ;)

  19. Happy birthday to Oreos! I wish i knew, I would have picked some up at the store when I was there earlier ;) I like to dip my oreos in cold milk… mmmmmm

  20. I just found your site today and had to laugh at the title Love Veggies and Yoga, only to scroll down and see Oreo’s. I’m glad to know that another traditionally healthy gal eats Oreo’s when they happen to turn 100. What a great excuse to celebrate!

  21. I was actually never a fan of the actual Oreo cookies, but I LOVED cookies & cream ice cream. The best! The cookie pieces in it were always so much softer than regular Oreos are. Giving up my favorite flavor of ice cream since going gluten-free was a bummer, but I can drool over these pictures at least!

  22. thankfully i did not buy a bag of those!
    they would have never made it to the brownies!
    gosh those look soooo good.

  23. Haha…you finally gave in :-) These look seriously awesome– I’d like for you to fed-ex me some of that frosting today, please. Thanks!! :-)

  24. I want to eat the frosting off of all of them, lol. I have a raging sweet tooth at the moment. :)

    And yes, birthday Oreos, DO small like cake batter!! The smell is pretty amazing if you like cake batter. And who doesn’t? (Dustin) ha!

    1. I wish they tasted more like they smelled because other than Dustin, who doesn’t like cake batter? :)

  25. holy YUM! these look decadent! oreos + brownies = nearly perfect! you should make a brownie + oreo + peanut butter version… ;)

  26. Oh my goodness, these look so fun and delicious. My Oreo of choice is definitely the Double Stuff. I mean come on…can you think of anything better?

    Ok, maybe just these bars…

  27. You kill me. I want one of each of these brownies – the mint, the nutella, the cake batter oreos!!!

    It was my dad’s birthday yesterday. I think he deserves these.

    1. And between this batch and the mint, these are WAY less time consuming b/c that mint layer had many different things going on with mint, fluff, food coloring, melted white chocolate…these are much faster!

  28. i LOVE oreos. i don’t eat them often anymore, but when i was younger i would break them apart, lick off alllll the cream (duh) and then dunk the chocolate cookies into milk until they were nice and soggy. that, or i would stack them together to make a quadruple stuffed oreo (probably not the healthiest!)

  29. You little tease, I totally thought it was your birthday when you said the first line!!! Oh well, who says you can’t have 2 birthdays a year? or a birthday every time you make a treat??

    1. or a birthday every time you make a treat?? <--- I'd have about 300 bdays a year if that was the case! haha!

  30. Those just look so fun and festive. I think they would be great for a spring celebration or birthday party. Not really an oreo fan (crazy I know), but I always liked the filling. I remember loving those huge double stuffed cookies. So much filling!

  31. I can’t tell you the last time I had an oreo! But they are yummy :). These are so colorful and fun. Perfect for a birthday party.

  32. Mmm I love anything with Oreos in it. I would totally have these for my birthday! Happy birthday Oreo! And happy fake birthday to you too Averie! haha

  33. i KNEW you’d come up with something genius with these oreos Averie! these look perfectly amazing and all those colors from the sprinkles really amke your pictures EXTRA beautiful. (love the star sprinkles!) when i was growing up, i would smear peanut butter between oreos and stack up 3 or 4 of them. nowadays, i like my oreos crushed up in some type of cookies n cream dish!! yummm. although, i’m sure i’d still flip for those pb oreos i gorged on when i was little :)

  34. Oh my, you really have created an outstanding birthday tribute to Oreos! Fabulous!

    1. And major congrats to you for getting so high up in the Kitchn Photography voting…your photography is always so inspiring and you deserve it!

  35. So funny — “oreo” was the answer to a crossword puzzle question (clue: sandwich cookie) yesterday! When I ate oreos, milk was necessary, and I’d totally scrape the frosting out and then dunk away! If you dunk the sandwich halves, it decreases their boring factor by a little…and if you dunk enough, you’re left with chocolate milk — score!

  36. Those birthday oreos look amazing and even more amazing when they are stuffed inside a brownie! Definitely a very fitting birthday tribute!