Name: Buckeye Brownies
Prep time: 15 min
Cook time: 25 min
Total time: 2 h 40 min
Cuisine: American
Ingredients: 1 box (18.3 oz) fudge brownie mix (plus ingredients listed on the box: typically eggs, oil, and water); 1 1/2 cups creamy peanut butter; 1/2 cup unsalted butter, melted; 2 cups powdered sugar; 1 teaspoon vanilla extract; 1 1/2 cups semi-sweet chocolate chips; 1/2 cup heavy cream

Decadent, rich, and absolutely irresistible—these Buckeye Brownies are a dreamy fusion of three incredible layers: a fudgy brownie base, a creamy peanut butter center, and a smooth chocolate ganache topping. Inspired by the classic Buckeye candy, I love making these when I want a dessert that’s as beautiful to serve as it is indulgent to eat.

Why You’ll Love This Recipe

I always reach for this recipe when I want a guaranteed crowd-pleaser. The combination of peanut butter and chocolate never fails, and the layered look makes it seem like I spent way more time in the kitchen than I actually did. These brownies are easy to make with boxed brownie mix but feel completely homemade thanks to the rich, creamy peanut butter layer and the silky ganache on top. They’re perfect for holidays, potlucks, or anytime I want to impress with minimal effort.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

Brownie Layer:

1 box (18.3 oz) fudge brownie mix (plus ingredients listed on the box: typically eggs, oil, and water)

Peanut Butter Layer:

1 1/2 cups creamy peanut butter

1/2 cup unsalted butter, melted

2 cups powdered sugar

1 teaspoon vanilla extract

Chocolate Ganache Topping:

1 1/2 cups semi-sweet chocolate chips

1/2 cup heavy cream

Directions

I preheat the oven to 350°F (175°C) and line a 9×13 inch baking dish with parchment paper or grease it lightly.

I prepare the brownie batter according to the package directions, then pour it into the dish and bake for 20–25 minutes, or as directed. Once done, I let the brownies cool completely.

In a separate bowl, I mix the melted butter, creamy peanut butter, powdered sugar, and vanilla extract until smooth.

I spread the peanut butter layer evenly over the cooled brownie base, smoothing it out with a spatula. Then, I refrigerate it while making the ganache.

For the ganache, I microwave the chocolate chips and heavy cream in 20-second bursts, stirring between each interval, until everything is melted and smooth.

I pour the ganache over the peanut butter layer and spread it evenly.

I refrigerate the entire dish for 1–2 hours, or until the ganache is fully set. Then, I cut them into squares and serve.

Servings and timing

Servings: 24 brownies

Prep Time: 15 minutes

Cooking Time: 25 minutes

Chilling Time: 2 hours

Total Time: 2 hours 40 minutes

Calories per serving: 410 kcal

Variations

I sometimes add chopped peanuts to the ganache for a little crunch on top.

For a sweeter twist, I use milk chocolate chips instead of semi-sweet.

If I want to make it from scratch, I use a homemade brownie recipe instead of the box mix.

To make them gluten-free, I swap in a gluten-free brownie mix.

I occasionally swirl a bit of extra peanut butter into the ganache before it sets for a marbled effect.

Storage/Reheating

I store these brownies in an airtight container in the refrigerator for up to 5 days. If I want a softer texture, I take them out and let them sit at room temperature for about 15 minutes before serving. They also freeze well—just separate layers with parchment paper and keep them in a freezer-safe container for up to 3 months. I let them thaw in the fridge overnight or on the counter for a few hours.

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FAQs

How do I know when the brownie layer is fully baked?

I check the center with a toothpick—if it comes out with a few moist crumbs, it’s ready. I avoid overbaking to keep the base fudgy.

Can I use natural peanut butter?

I recommend sticking with creamy commercial peanut butter for the best texture. Natural versions can separate and create a grainy layer.

Can I make these ahead of time?

Yes, I often make them a day in advance. In fact, I find the flavor gets even better after chilling overnight.

What’s the best way to cut clean brownie squares?

I use a sharp knife and wipe it clean between cuts. Chilling the brownies thoroughly makes cutting much easier.

Can I double this recipe?

Absolutely—I double it and use two 9×13 pans or a larger sheet pan when I’m baking for a party or event.

Conclusion

When I want something indulgent and satisfying, Buckeye Brownies never disappoint. The rich chocolate, the creamy peanut butter, and that smooth ganache come together in a way that’s simply unforgettable. Whether I’m baking for a holiday, a get-together, or just to treat myself, this is one dessert I always come back to.

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