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Indulgent chocolate-peanut butter squares styled to showcase their layered structure and richness.

Truffle Peanut Butter Brownies

These Truffle Peanut Butter Brownies feature a fudgy brownie base, a smooth peanut butter filling, and a rich chocolate ganache topping for a layered dessert that is creamy, chocolatey, and deeply satisfying.
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Course: Dessert
Cuisine: American
Keyword: Truffle Peanut Butter Brownies
Prep Time: 30 minutes
Cook Time: 20 minutes
Total Time: 50 minutes
Servings: 0

Ingredients

For the Brownies

  • 1 c butter
  • 2 c sugar
  • 3 eggs
  • 3 tsp vanilla
  • 2/3 c cocoa powder
  • 1 c all-purpose flour
  • 1/2 tsp salt
  • 1/2 tsp baking powder

For the Peanut Butter Filling

  • 1/2 c butter softened
  • 1/2 c creamy peanut butter
  • 2 c powdered sugar
  • 2 to 3 tsp milk

For the Ganache Topping

  • 1/4 c creamy peanut butter
  • 2 c semisweet chocolate chips
  • 1/4 c butter
  • 2 tbsp heavy whipping cream

Instructions

Prepare the Brownie Base

  • Preheat the oven to 350°F.
  • Butter the bottom and sides of a 9 x 13-inch metal baking pan.
  • Line the pan with a long sheet of parchment paper, allowing the paper to extend over two sides for easy removal. Butter the parchment paper.
  • In a medium saucepan over medium heat, melt the butter.
  • Remove the saucepan from the heat and stir in the sugar until combined.
  • Add the eggs and vanilla, and beat until fully incorporated.
  • Stir in the cocoa powder, baking powder, and salt until well blended.
  • Add the flour and stir just until combined and no dry streaks remain.
  • Pour the batter into the prepared pan and spread it into an even layer.
  • Bake for 25 to 30 minutes.
  • Remove from the oven and allow the brownies to cool completely in the pan on a wire rack.

Prepare the Peanut Butter Filling

  • In the bowl of a stand mixer fitted with the paddle attachment, combine the softened butter, peanut butter, powdered sugar, and milk.
  • Beat until smooth and spreadable. Add a little more milk if needed to adjust the consistency.
  • Spread the filling evenly over the cooled brownie layer.
  • Refrigerate for about 30 minutes, or until the filling is set.

Prepare the Ganache Topping

  • In a double boiler or a microwave-safe bowl, combine the peanut butter, chocolate chips, butter, and heavy whipping cream.
  • Heat gently until melted, then stir until smooth.
  • Pour the ganache over the chilled peanut butter layer and spread gently into an even layer.
  • Return the pan to the refrigerator until the topping is fully set.
  • Once firm, lift the brownies from the pan using the parchment overhang and cut into squares.

Notes

To make these Truffle Peanut Butter Brownies gluten free, replace the all-purpose flour with a reliable 1:1 gluten-free baking flour blend that includes xanthan gum or a similar binder. Also check that the cocoa powder, powdered sugar, chocolate chips, peanut butter, baking powder, vanilla, and any packaged ingredients are labeled gluten free, since some brands may vary or be processed in shared facilities. If your gluten-free flour blend does not already contain a binder, you may need to add a small amount of xanthan gum to help maintain the texture of the brownie base. For anyone with celiac disease or severe gluten sensitivity, use clean bowls, mixers, spatulas, pans, parchment, and cutting tools to avoid cross-contact.