Name: Reese's Pieces Peanut Butter Brownies
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Ingredients: 1 cup (2 sticks) unsalted butter, (room temperature); 2 1/2 cups granulated sugar; 1/2 cup creamy peanut butter; 4 large eggs; 1 1/2 Tbsp vanilla; 1 1/2 cups all-purpose flour; 1 cup unsweetened cocoa powder; 1 tsp salt; 1 1/2 cups chopped peanut butter cups ((about 28 peanut butter cups; note that there are about 38 in a 12 oz. bag)); 1/2 cup Reese's Pieces

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These Reese's Pieces Peanut Butter Brownies are packed with peanut butter, chocolate, Reese's Peanut Butter Cups, and Reese's Pieces. Peanut butter lovers, rejoice!

Head-on view of a stack of three Reese's Pieces peanut butter brownies with box of Reese's Pieces in the background with recipe title at top

(This recipe for Reese's Pieces Peanut Butter Brownies was originally published in February 2009, but has been updated with new photos and content.)

Is there such a thing as too much peanut butter? If you're thinking "yup, there is!" then you should probably leave now because you're really not going to like these Reese's Pieces brownies. They involve peanut butter in three forms.

But you know what? They're not overly omg sticking to the top of your mouth peanut butter brownies. I think all of that chocolate really helps balance things out. If you don't love peanut butter, you must at least love peanut butter and chocolate together, right??

I first made these chocolate peanut butter brownies wayyy back in 2009, after seeing the recipe on Grumpy's Honeybunch. Sometimes I laugh to myself when I re-read my old posts because I say things like, "next time I'd add peanut butter into the batter." Okayyy, Sues, then why the heck didn't you add peanut butter into the batter before posting about them??

It's like, "here, I'm giving you a recipe, but there are like 10 things I'd do differently next time I make it, so..." Anyway, I suppose blogging times were different back then. So, now that we're in a new era, I went back and made some adjustments to the original recipe until I got to my ideal chocolate peanut butter brownies and I'm updating the recipe here for you now.

Reese's Pieces Peanut Butter Brownies Recipe

But don't worry, these peanut butter brownies are still super easy to make and are made in a 13x9 pan, which means you'll end up with 24 chocolate peanut butter brownies. Which means you can probably share a couple of them and still have enough for yourself.

All you have to do is mix the wet ingredients together, mix the dry ingredients together, and then combine the two. Don't forget to fold in the Reese's Peanut Butter Cups!

Then spread the batter in the pan, top with Reese's Pieces, and bake away.

Collage showing process for making Reese's Pieces peanut buttery brownies, including chocolate brownie batter in pan with Reese's Pieces on top, peanut butter brownie batter in mixer, and crushed peanut butter cups in measuring cup

Oh wait, before we move on, we need to talk about the fact that Reese's Pieces do not actually have chocolate in them. Does that blow your mind?

I realize I brought that up the last time I posted a Reese's Pieces recipe, but I feel like I need to make this public service announcement again. If you were already aware then carry on, nothing to see here, I've just clearly been living under a rock.

Either way, I think there's enough chocolate in these Reese's brownies to excuse the lack of chocolate in Reese's Pieces.

Overhead view of stack of three Reese's Pieces peanut butter brownies with Reese's Pieces and more brownies in background

And now that I've adjusted the original recipe, there's also enough peanut buttery goodness to my liking.

Because check out that chocolate. I mean, just look at it. It's so fudgy and intense that you need a little bit of peanut butter to cut through it.

Landscape head-on view of stack of three chocolate Reese's Pieces peanut butter brownies with Reese's Pieces and more brownies in background

And obviously the Reese's Pieces scattered about on top add a little bit of crunch. And more peanut butter brownie balance.

These are totally the kind of brownies you want to bring to a party. Or sell at a bake sale. Or just have in your kitchen at all times so whenever a guest pops in, you can say, "oh, would you like a Reese's Pieces brownie?"

Something tells me you'd start to have guests wayyy more often than you'd like.

More Peanut Butter Desserts

If you love all things peanut butter and peanut butter desserts as much as I do, be sure to check out some of my other favorite recipes:

Peanut Butter Toffee Cookies
Chocolate Peanut Butter Cheerios Granola Bars
Peanut Butter Chocolate Muffins
Peanut Butter and Jelly Cupcakes
Peanut Butter Blondies with Chocolate Ganache
XL Peanut Butter Cookies with Sprinkles
Peanut Butter Banana Pupcakes (because your dog probably loves peanut butter, too!)
Reese's Pieces Pudding Cookies (from Peas and Crayons)
Reese's Peanut Butter Chocolate Cupcakes (from Life Made Sweeter)

Head-on view of a stack of three Reese's Pieces peanut butter brownies with box of Reese's Pieces in the background

But the best part is that these peanut butter brownies are classic brownies that were delicious in 2009 and are still delicious almost nine years later.

And if they're not still delicious twenty years from now, well then, let's just say 2038 is not a time I'm looking forward to very much.

Are you always in the mood for chocolate and peanut butter? If not, what do you prefer?

Reese's Pieces Peanut Butter Brownies

Reese's Pieces Peanut Butter Brownies are packed with peanut butter, chocolate, Reese's Peanut Butter Cups, and Reese's Pieces. Peanut butter lovers, rejoice!

5 from 1 vote

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Course: Dessert

Cuisine: American

Keyword: Brownie Recipes, Peanut Butter and Chocolate, Peanut Butter Desserts, Reese's Pieces Desserts

Prep Time: 15 minutes

Cook Time: 35 minutes

Total Time: 50 minutes

Servings: brownies

Author: We are not Martha

Ingredients

1 cup (2 sticks) unsalted butter, room temperature
2 ½ cups granulated sugar
½ cup creamy peanut butter
4 large eggs
1 ½ Tbsp vanilla
1 ½ cups all-purpose flour
1 cup unsweetened cocoa powder
1 tsp salt
1 ½ cups chopped peanut butter cups (about 28 peanut butter cups; note that there are about 38 in a 12 oz. bag)
½ cup Reese's Pieces

Instructions

Pre-heat oven to 350 degrees and lightly grease a 9×13 baking dish.
In the bowl of a stand mixer or in a large bowl with a hand mixer, cream together butter and sugar until light and fluffy.
Beat peanut butter into the mixture until smooth. Add eggs one at a time, mixing well after each addition. Beat in vanilla.
In a separate large bowl, whisk together flour, cocoa powder, and salt.
Add the dry mixture to the wet ingredients and mix until just combined. Fold peanut butter cups into batter.
Pour the mixture into prepared baking dish and sprinkle Reese's Pieces over the top.
Bake at 350 degrees for about 35 minutes, until a toothpick comes out clean. Set pan on a wire rack and let cool for about 10 minutes before slicing.

Notes

Recipe adapted from Grumpy's Honeybunch

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