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Stack of Reese's Pieces peanut butter brownies with Reese's Pieces candy in background

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: 24 brownies
Author: We are not Martha


  • 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


  • 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.


Recipe adapted from Grumpy's Honeybunch
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