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reese's peanut butter cup brownies. top down view of brownies topped with mini and king size peanut butter cups. brownies are uncut in an 8x8 baking pan lined with white parchment paper. baking pan is sitting on a round wire rack. background is abstract blue and white.
Heather Wolf

Peanut Butter Cup Brownies

5 from 8 votes
Rich and decadent, Reese's Peanut Butter Cup Brownies are a dream dessert. With creamy peanut butter mixed into the fudgy batter and tons of peanut butter cups on top, the combination of flavors is irresistible and incredibly satisfying.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings: 9
Course: Brownies and Blondies
Cuisine: American
Ingredients Equipment Method

Ingredients
  

Peanut Butter Cup Brownies
  • 1/2 cup unsalted butter melted and cooled
  • 3/4 cup dark brown sugar packed
  • 3/4 cup granulated sugar
  • 2 tsp vanilla extract pure
  • 1/2 cup creamy peanut butter
  • 3 large eggs room temperature
  • 3/4 cup unsweetened cocoa powder
  • 1/2 tsp sea salt fine
  • 3/4 cup all-purpose flour unbleached
  • 4 peanut butter cups king size
  • 15 mini peanut butter cups
  • sea salt (optional topping)

Equipment

  • 8x8 metal baking pan

Method
 

Peanut Butter Cup Brownies
  1. Preheat oven to 350 degrees. Line an 8 x 8 metal baking pan with parchment paper and set aside.
  2. In a large bowl, whisk together melted butter, both sugars, vanilla and peanut butter until combined.
  3. Add eggs, one at a time, whisking vigorously after each addition until well incorporated.
  4. Stir in cocoa powder, salt, and flour until *just* combined.
  5. Spoon batter into parchment-lined baking pan then level the top with a spatula.
  6. Bake for 25 minutes or until a tester inserted into center of brownies comes out with a few moist crumbs. Do not overbake or brownies will be dry.
  7. Remove pan from the oven and place on a wire rack to cool.
  8. Remove wrappers from peanut butter cups. After brownies have cooled for 10 minutes, gently push peanut butter cup bottoms into the brownie crust.
  9. Allow brownies to cool to completely at room temperature before slicing.
    *If the peanut butter cups are still a bit melty after brownies have cooled, refrigerate a few minutes until firm.
  10. If desired, sprinkle peanut butter cups with sea salt.
  11. Cover and store leftovers at room temperature up to 1 week.