A plate of layered peanut butter brownies with a layer of peanut butter filling and chocolate on top.
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Peanut Butter Brownies

Layered peanut butter brownies (Buckeye Brownies) have a fudgy brownie base, peanut butter middle that tastes like a peanut butter cup & chocolate topping!
Prep Time45 mins
Cook Time30 mins
Cooling4 hrs
Total Time5 hrs 15 mins
Course: Dessert
Cuisine: American
Keyword: peanut butter brownies
Servings: 24 brownies
Calories: 534kcal
Author: Fiona

Ingredients

Peanut Butter Layer

  • 1 cup unsalted butter cut into pieces
  • 8 oz semi-sweet chocolate, chopped or 1 1/4 cup chocolate chips
  • 2 cups white sugar
  • 4 large eggs
  • 1/2 cup cocoa powder
  • 3/4 cup all-purpose flour
  • 1/2 teaspoon salt

Peanut Butter Filling

  • 1/2 cup unsalted butter
  • 1 1/2 cups peanut butter
  • 2 1/2 - 3 cups powdered sugar

Chocolate Topping

  • 10 oz semi-sweet chocolate, chopped or 1 1/2 cups chocolate chips
  • 1/3 cup heavy cream

Instructions

Brownie Layer

  • Preheat the oven to 350F degrees and line a 9x13 inch pan with parchment so there's an overhang around the sides.
  • Add the butter and chocolate to a large heatproof bowl. Microwave on medium power for 45-second intervals, stirring between each, until smooth. Do not microwave on high/regular power!
  • Let the mixture cool slightly, then whisk in the sugar followed by the eggs 1 at a time.
  • Gently fold in the cocoa powder, flour and salt.
  • Pour the mixture into the prepared pan and bake for 30-35 minutes, or until an inserted toothpick comes out clean or with a few damp crumbs.
  • Cool the brownies fully (keeping them in the pan).

Peanut Butter Layer

  • In a large bowl, beat the butter until soft.
  • Beat in the peanut butter.
  • Beat in the powdered sugar, starting with 2 cups. Slowly beat in the remaining powdered sugar a little at a time until the mixture is thick and the desired sweetness is reached.
  • Spoon the peanut butter mixture over the brownies. Using a piece of wax paper between your hand and the peanut butter layer, press the mixture down until it's a flat, smooth layer
  • Place in the fridge for 30 minutes to firm up.

Chocolate Topping

  • Place the chocolate in a large heatproof bowl.
  • Heat the cream until almost boiling - either in the microwave or on the stovetop while stirring gently.
  • Pour the hot cream over the chocolate and let it sit for 3 minutes. Whisk until smooth. If the chocolate isn't quite melted, microwave for 30 seconds on medium power.
  • Pour the chocolate over the peanut butter layer and spread smooth.
  • Place in the fridge for the chocolate to set.
  • Cut into bars.

Notes

Instead of making homemade brownies, feel free to use a box mix for a 9x13 inch pan. Prepare the brownies according to the package instructions, then make the remaining layers according to the recipe.
I recommend storing these in the fridge in an airtight container so that the peanut butter layer doesn't melt. 

Nutrition

Calories: 534kcal | Carbohydrates: 63g | Protein: 7g | Fat: 30g | Saturated Fat: 15g | Cholesterol: 71mg | Sodium: 142mg | Potassium: 274mg | Fiber: 3g | Sugar: 53g | Vitamin A: 465IU | Calcium: 34mg | Iron: 2mg