Inspired by classic buckeye candies, these buckeye brownies are a decadent three-layer treat for anyone who loves the combination of peanut butter and chocolate. A fudgy brownie forms the base, a creamy buckeye-style peanut butter layer sits in the middle, and a smooth chocolate ganache finishes the top.
These bars taste like a peanut butter cup set on a brownie. The brownie layer is fudgy and chewy without being overly rich. The peanut butter center is sweet, salty, and silky—very similar to buckeye candies. A simple ganache creates a glossy chocolate topping. Though made from scratch, the recipe is straightforward and well worth the extra step for homemade layers.
This recipe uses basic pantry ingredients rather than a boxed mix. While building three layers takes a little more time, the process is simple: prepare and bake the brownie base, spread the peanut butter filling, then pour and smooth the chocolate topping. Chilling briefly between steps helps the layers set neatly.
What Are Buckeyes?
Buckeye candies are a popular homemade confection, especially around the holidays. They consist of a firm, peanut butter–based center—somewhere between peanut butter fudge and the filling of a peanut butter cup—dipped in chocolate. The name comes from the resemblance to buckeye tree nuts. These brownies capture that flavor profile in bar form, with a peanut butter layer sandwiched between chocolate components.
Making Buckeye Brownies
Begin with the brownie layer. These brownies are formulated to be chewy rather than gooey so they can support the peanut butter layer without collapsing. Key steps:
- Prep. Preheat the oven and line a 9×13 inch pan with parchment paper, leaving an overhang for easy removal.
- Melt chocolate and butter. Combine gently to prevent the chocolate from seizing or becoming grainy.
- Add eggs, sugar, and vanilla. Let the chocolate mixture cool slightly before whisking in the eggs so they don’t curdle.
- Fold in dry ingredients. Sift cocoa powder first to avoid lumps, then combine with flour and salt.
- Bake. Spread the batter in the prepared pan and bake until the top is set and a toothpick comes out clean or with a few moist crumbs.
After the brownies cool completely in the pan, prepare the peanut butter filling:
- Beat the butter. Start with very soft butter to make a smooth filling.
- Add peanut butter, powdered sugar, vanilla, and salt. Sift powdered sugar to remove lumps and beat until the mixture is uniform and creamy.
- Spread the filling. Use an offset spatula or the back of a spoon to create an even layer over the chilled brownie base.
Finish with a chocolate ganache topping:
- Melt chocolate and butter together. Heat slowly and stir frequently. In the microwave, use short 20-second intervals on medium power and stir between each. Alternatively, melt gently over a double boiler, ensuring no steam or water touches the chocolate bowl.
- Pour and smooth. Spread the warm ganache evenly over the peanut butter layer. Work quickly so the topping sets smooth and glossy.
Recipe Tip
Allow the bars to set fully before slicing. Let them sit at room temperature for about 1 hour or chill in the refrigerator for about 1 hour to speed up the process. Lift the bars from the pan using the parchment overhang, place on a cutting board, peel back the paper, and slice with a thin, sharp knife, wiping the blade between cuts for clean slices.
Storage
Store the brownies in an airtight container at room temperature for up to 4 days, or in the refrigerator for up to 7 days. If your kitchen is warm, refrigeration will keep the peanut butter middle from becoming soft. These brownies can also be frozen for up to 2 months; wrap tightly, place in a freezer-safe container, and thaw in the refrigerator before serving.
Ingredients (summary)
- Brownie layer: butter, semi-sweet chocolate, granulated sugar, eggs, cocoa powder, all-purpose flour, salt
- Peanut butter middle: unsalted butter, smooth peanut butter, powdered sugar, vanilla, salt
- Chocolate topping: semi-sweet chocolate, unsalted butter
Basic Instructions (summary)
- Preheat oven to 350°F (180°C). Line a 9×13 pan with parchment.
- Melt butter and chocolate; cool slightly, then whisk in sugar, eggs, and vanilla. Fold in sifted flour, cocoa, and salt. Bake until set.
- Cool brownies fully in the pan. Make the peanut butter filling and spread evenly over the cooled brownies.
- Melt chocolate and butter for the topping, pour over the peanut butter layer, and smooth. Chill or let set at room temperature until firm before slicing.
Notes
- Chocolate: Use semi-sweet or 50–60% dark chocolate for both the brownie and the topping.
- Peanut butter: Use smooth peanut butter with a stable texture (not one that separates with oil on top).
- Nutrition: Nutrition values vary by portion; estimates are typically per brownie when sliced into 18 pieces.