Fudgy Flourless Peanut Butter Cup Brownies

4.85 from 20 votes
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Flourless Peanut Butter Cup Brownies taste ridiculously amazing. Rich, fudgy homemade brownies are swirled with peanut butter and dotted with chunks of Reese’s peanut butter cups for a decadent chocolaty dessert nobody can resist. This easy gluten-free brownie recipe is definitely one of the ultimate chocolate peanut butter desserts!

Flourless Peanut Butter Cup Brownies Recipe

Originally published on March 25, 2014. Updated and republished on July 19, 2017.

I have a peanut butter problem. I seriously can’t stop eating the stuff. Like, open jar and insert spoon. Throw chocolate into the mix and forget about it.

When I was little, we always went to this ice cream place where they make Blend-Ins – you know, ice cream whizzed up with toppings. My order every single time – chocolate ice cream with peanut butter cups. 

I’ll let you guess what were the first types of candy to disappear from my Halloween stash. I mean, the only reason to not devour all the Reese’s is to make a Reeses Cake so that I can just eat more chocolate and peanut butter with my chocolate and peanut butter.

And do you think I usually make a blueberry smoothie or a pineapple smoothie or something like that? Nope. Most often it’s, yup, you guessed it, a Chocolate Peanut Butter Banana Smoothie!

Flourless Reese's Peanut Butter Cup Brownies

Gluten-Free Peanut Butter Swirl Brownies

So these aren’t just any brownies. Naturally, they are chocolate peanut butter brownies! Beyond that, they are flourless brownies for extra gooey, chocolate intensity. Then they are swirled with creamy, dreamy peanut butter for that salty, peanutty contrast to the sweet, fudgy brownie. And, of course, they are scattered with chunks of peanut butter cups for texture, and, you know, more chocolate and peanut butter.

 

Just pour me a glass of milk and give me one (dozen)! Or if you are actually willing to share, brownies are always one of the best potluck ideas for dessert. So bring a batch along with that lasagna or corn casserole.

What do you need to make these gluten-free brownies?

Ingredients:

  • Chocolate chips
  • Butter
  • Eggs
  • Sugar
  • Cocoa powder
  • Almond meal
  • Salt
  • Vanilla
  • Peanut butter
  • Peanut butter cups

Equipment:

  • 13×9 inch baking pan
  • Parchment paper
  • Double boiler or a heatproof bowl and a saucepan
  • Rubber spatula
  • Whisk
  • Butter knife or small spatula

Gluten Peanut Butter Cup Brownies

How do you make Flourless Peanut Butter Cup Brownies?

  1. Preheat your oven to 350°F
  2. Melt the butter and chocolate chips together in a double boiler or in a glass bowl over a simmering pot of water.
  3. Set it aside to cool.
  4. Whisk the eggs and sugar until they get thick and pale yellow. 
  5. Add the chocolate mixture a little at a time into the egg mixture, whisking constantly until it is smooth.
  6. Whisk in the almond meal, vanilla, cocoa powder, and salt.
  7. Pour the brownie batter into the baking pan.
  8. Drizzle the brownie batter with peanut butter and swirl it around, and sprinkle on the peanut butter cups.
  9. Bake for about 20 minutes or set in the middle. 
  10. Cool completely in the pan.

Flourless Peanut Butter Swirl Brownies

Homemade Peanut Butter Brownie Recipe Tips:

  • I recommend lining your baking pan with parchment paper. It really helps with removing these uber-gooey brownies from the pan.
  • Don’t rush the step where you whisk the eggs. It really only takes a minute or two, but when you add the eggs to the sugar and whisk, you want to be sure the mixture gets very pale yellow and thick. And yes, I do typically do this by hand with a wire whisk. I figure it helps burn off some of the brownie calories.
  • The best way to tell if the brownies are done is just by looking to see if they are set in the middle. You can try to see if a toothpick inserted comes out clean, but with the peanut butter and bits of Reese’s, you might not be able to tell that way.

Peanut Butter Cup Brownies with milk

Are Flourless Peanut Butter Cup Brownies gluten free?

As I mentioned, this is a flourless brownie recipe, so it is naturally gluten free. It is my go-to brownie recipe, and I’ve turned it into everything from Ricotta Brownies to Turtle Brownies

While these brownies don’t contain all-purpose flour, they do have almond meal or almond flour, which is gluten free and typically easy to find these days.

Always be sure to read labels on ingredient such as vanilla extract and cocoa powder to ensure that they do not have any sneaky gluten-containing ingredients or are produced in a facility where there could be cross-contamination. You might also want to check your chocolate chips. I always use the Costco-sized bag of Nestle Toll House Morsels.

So there’s just one last thing to check when making Flourless Peanut Butter Cup Brownies.

Are Peanut Butter Cups gluten free?

Hershey states on their website that all Reese’s Peanut Butter Cups are gluten-free except the specially shaped ones for the holidays. So just stick with the regular or mini Reese’s and you are good to go.

You can also use Justin’s Peanut Butter Cups, which are certified gluten-free.

Gluten Free Brownies with Peanut Butter Cups

What are more gluten-free chocolate and peanut butter desserts? 

What are more reader favorite gluten-free dessert recipes?

Flourless Peanut Butter Cup Brownies Recipe

Making gluten-free brownies doesn’t get any easier than when you just skip the flour completely and bake flourless brownies. This makes them extra rich and fudgy. Then add swirls of peanut butter and plenty of Reese’s Peanut Butter Cups and you have a pan of epic chocolate peanut butter brownies that nobody can resist. You get double the chocolate, double the peanut butter, and none of that pesky flour. 

Gluten Free Brownies with Peanut Butter Cups
4.9 from 20 votes

Flourless Peanut Butter Cup Brownies

Rich, fudgy brownies swirled with peanut butter and chunks of peanut butter cups make these flourless brownies ridiculously amazing (and gluten free!).
Prep: 15 mins
Cook: 30 mins
Total: 45 mins
Servings: 24

Ingredients

  • 1 cup semisweet chocolate chips
  • 1/2 cup unsalted butter
  • 4 large eggs
  • 1 cup sugar
  • 1/2 cup cocoa powder
  • 1/2 cup almond meal
  • 1/2 tsp salt
  • 2 tsp vanilla
  • 1/2 cup creamy peanut butter
  • 12 mini peanut butter cups, coarsely chopped

Instructions

  • Preheat your oven to 350°F and line a 13×9 inch pan with parchment paper (or grease really, really well, though I’d recommend the parchment).
  • In a double boiler or a bowl set over a simmering pan of water, melt the butter, then add the chocolate chips, stirring until melted. Set aside to cool slightly.
  • In a large bowl, whisk together the eggs and sugar for a minute or two.
  • Add melted chocolate mixture a little at a time, whisking well after each addition.
  • Whisk in the cocoa powder, almond meal, salt, and vanilla.
  • Pour the batter into the prepared pan and spread evenly.
  • Place small dollops of the peanut butter over the batter and then create swirls with a butter knife or small spatula. Scatter the chopped peanut butter cups over the top of the batter and lightly press in any larger chunks.
  • Bake at 350°F for 20-25 minutes, or until just set in the middle.
  • Cool completely in the pan before cutting.
Nutrition Facts
Flourless Peanut Butter Cup Brownies
Amount Per Serving (1 brownie)
Calories 189 Calories from Fat 108
% Daily Value*
Fat 12g18%
Saturated Fat 5g25%
Cholesterol 41mg14%
Sodium 99mg4%
Potassium 128mg4%
Carbohydrates 16g5%
Fiber 1g4%
Sugar 13g14%
Protein 4g8%
Vitamin A 165IU3%
Calcium 23mg2%
Iron 1.1mg6%
* Percent Daily Values are based on a 2000 calorie diet.

Enjoy!

230 Comments
  1. Sylvia

    5 stars
    I love how you size your brownie recipes for 9″x13″ pans, while every other website I’ve looked at uses an 8″ square! LOL!!! A baker after my own heart… These look amazing. I’m going to make them for my son’s talent show tomorrow night.

  2. Amita Patel

    Hey,
    This look like I want to rip my screen to eat them. I was recently diagnosed for gluten intolerance and am allergic to eggs. I tried Betty Crocker brownie mix with egg replacer and it stuck to my pan and so greasy that I just threw the whole thing in trash. I would really like to try these but want to know if an egg replacer would work or not.

    Reese’s peanut butter candy line, all of them are my favorite 🙂

    1. Oh no! Honestly, I’ve never used the Betty Crocker gluten free mix and have never worked with egg replacer. I’ll see if any of my vegan friends have used egg replacer in a recipe like this. I know that sometimes egg is critical in gluten free baking to hold it together since it doesn’t have the gluten from flour.

      1. Amita Patel

        I followed your recipe with half of the measurements and substituted 2/3 cups of applesauce for 2 eggs. It was little runny so I added 1/4 cup of GF oats flour. I also used mini muffin pan rather than baking them in a square pan as I wasn’t sure how the results would be and if an 8X8 would be big or small enough. The results…they were okay as I didn’t care much for the melted chocolate chips taste but not bad. Next time I want to try only cocoa powder and omit chocolate chips. Your post has inspired me and I want to thank you as I have been craving some brownies for a while 🙂

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  4. EVA

    Favorite chocolate-peanut butter treat? What ISN’T? That’s my answer!

    Those bars look so good. I haven’t salivated this much for a very long time.

    Damn….I really want that third prize pack…..

  5. Deb

    These brownies sound fabulous! I will make them for my niece’s birthday party. The family always says I don’t need to bring anything when I ask but I know they love it when I bring any of my chocolate goodies. I’m pretty much known for being a chocoholic – not sure that’s a good thing!?!
    My favorite is my chocolate peanut butter pie. It’s so light and fluffy and has lots of chopped up peanut butter cups all through it and scattered on top for garnish. Mmmm!

  6. Lisa Jones

    Whoa! Those brownies look awesome! I think my favorite is the ole stand-by. Reese’s Peanut butter Cup (or a Hershey bar and a jar of peanut butter in emergencies)

  7. olivia tokarz

    Anything with chocolate and peanut butter! I Love Reese Pieces peanut butter pudding cookies, they are amazing! 🙂

  8. Karen

    I love many forms of chocolate and peanut butter together! I had some giant peanut butter cup chunks last night from my husband’s “Everything But The…” Ben & Jerry’s pint. Those were wonderful. I also love chocolate peanut butter brownies like you made! I really like peanut butter cookies with chocolate chips too. I have yet to meet a chocolate and peanut butter combo that I don’t like, actually!

  9. Doreen McCloskey

    5 stars
    I can’t decide which of these is my favorite. They’re all divine. Another great recipe not listed is: Devils Food Cupcakes stuffed with Peanut Butter Ball and frosted with Peanut Butter Cream Frosting. Oh my goodness, these are so delicious!

  10. lynzee mathews

    My Favorite peanut butter and chocolate treat would be the no bake peanut butter and chocolate bars. Delicious! And when it’s just me at home I take a spoonful of peanut butter and pour chocolate syrup over it. Lol

  11. Dorothy

    My favorite has to be smittenkitchen’s chocolate cake w/ PB frosting. Or maybe it’s moose tracks ice cream…or maybe just an english muffin w/ nutella and PB – I can’t even decide!

  12. 5 stars
    Your brownies look wonderful and to imagine they are flourless — wow! I know they would be a 5 star recipe, even though I haven’t baked them yet. With no flour, the chocolate would only taste richer!!

    If forced to choose, I would have to say my favorite chocolate peanut butter confections were Buckeyes and a good creamy peanut butter pie with a chocolate crust and a chocolate topping. Delicious!!

  13. Debbie Gates

    I like my peanut butter and chocolate the old fashioned way…….Peanut butter scooped out of the jar with a bar of dark chocolate. Simple and oh so good.

  14. Kristen M

    I’m a fan of no-bake chocolate-peanut butter oatmeal cookies. They’re quick to make and perfect to use as candy egg “nests” for springtime treats.

    1. ashley

      Baskin robbins pb chocolate ice cream….or just pb and chocolate chips/bars (whatever is in the house) on a spoon with my morning coffee!!

  15. Cindy Padgett

    Oh, my gosh!!!! I am going to make these as as soon as my daughter gets home from college. Or maybe I will invite some other family over to have an excuse to make them sooner. Thank-you 🙂

  16. Lisa M

    OMG this looks so yummy! I’ve been reading your blog for a while now, but I just had to comment on the deliciousness in this post! Definitely making these this weekend… I’m usually a fan of anything chocolate and peanut butter, but absolute fav is the peanut butter blossom cookies that my mom has been making as long as I can remember. She brings them to every party and always gets asked for the recipe.

  17. So many “favorites”. But I have been thinking a lot lately of a chocolate cake with peanut butter frosting my incredible step mom makes. Brings back some amazing memories.

  18. Cynthia

    5 stars
    Yummo! There’s nothing that goes together better than peanut butter and chocolate… and add that to a baked good and I’m in heaven… now only if you were here to bake and share! 😉

  19. These looks fantastic!! My favorite peanut butter and chocolate treat has to be the original reeces peanut butter cup 🙂 I wish I had one right now.

  20. Robin C.

    5 stars
    My favorite peanut butter and chocolate treat is chocolate covered Ritz crackers with peanut butter smeared generously on top!

  21. Alice F

    Peanut Butter and Chocolate. …a match made in heaven! My favorite combination of the two is a brownie recipe that I make called Double Chocolate Chip Peanut Butter Heaven. Keeping my fingers crossed that I win this giveaway!

  22. Kristi Wolfe

    When I need a quick fix, I get a spoonful of crunchy peanut butter and dip it in semi sweet chocolate chips…yum!

  23. Stephanie Christon

    5 stars
    Peanut butter is one of my favorite things to eat. The brownies look great. Please post this comment. I bumped the rating button and post too fast on my first. Thanks.

  24. 5 stars
    I remember how excited I was when I discovered my kids were not allergic to peanuts. I’m hugely addicted to peanut butter and–not to make light of the matter–I was just so happy we could continue keeping it in the house! Great recipe for Chocolate Peanut Butter Day!

  25. Anna

    Flour less pb brownies?! I have died and gone to heaven! We’re chocolate + pb fans here. Just made a chocolate cake with peanut butter buttercream last week. Aaaaand we ate it all. lol

  26. Lisa

    4 stars
    Made these for my daughter to take to the combined youth activity, but not before grabbing a piece for those of us staying home.
    Super sweet, I’m going to make it again with 2/3-3/4 cup sugar instead, and maybe GF peanut butter chips too.
    The kids loved them.

    Thank you for posting a gluten free recipe! And dairy free!

  27. Meg

    My favorite chocolate and peanut butter treat are homemade peanut butter cups! I make them all the time, with graham crackers mixed in the peanut butter part to give it a crunch.

  28. sandy

    oh, these look soooo very good! i gave up lots of my stuff when i had to pack and move quickly. i am at bare basics. this would be wonderful!

  29. Flourless, you say! I am so making these for a new friend who is gluten-free. Well, as soon as I check that she’s not allergic to peanuts. 🙂 These are wonderful, Brianne! They look so chewy and rich!

  30. Brianne, I’m so glad you went the over the top, indulgent route with your recipe today. Today’s fabulous made up holiday deserves no less, lol. I’m swooning over how fudgy, rich and chewy these look. I’m so glad that Baby Smiles isn’t allergic to peanuts. It seems that there are so many kids with the allergy nowadays which would make life so hard for both you and him. Whew! Now you can keep indulging!

  31. Pam Gurganus

    My favorite chocolate-peanut butter treat is homemade peanut butter ice cream drizzled with homemade hot chocolate fudge!

      1. Pam Gurganus

        You sure can! But we only make it once a year (July 4th) because…believe it or not…we still make the ice cream the old fashioned way with the old hand-crank ice cream maker! We have a BIG family party for the holiday and every one gets a turn at the crank until the ice cream is done! 🙂 The little kids love it. Us older kids…not so much! *LOL*

  32. Debbie Caraballo

    I love anything with peanut butter and chocolate…..especially peanut butter bars – pb cookie base, creamy pb filling, and chocolate ganache on top!!!
    Thanks for this opportunity, Brianne!

    Deb

  33. Heather

    The Chocolate Peanut Butter Cookie Dough Ball looked really good…. but then again a Chocolate Peanut Butter Cake would be good too!

  34. Denise Fedor

    Buckeyes. I would love to make your recipe, but we are VERY tree nut allergic here. So many great sounding recipes, and then I see NUT meal or NUT flour!

  35. Whoa! TOO MUCH GOODNESS for this time in the morning! My head is spinning! Why do you torment me with so many delicious looking recipes at 7am AND work with Peanut Butter and Co? They are amazing! I am so very jealous! Your brownies literally look like THE PERFECT peanut butter brownie! I cannot even begin to chose my favorite, but probably a white chocolate reeses is my ultimate, or a blondie with peanut butter m and ms! Yum!

    Now I have to go on my run, dreaming of PB and chocolate!

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