If you’re a fan of rich, chocolatey desserts that pack a punch of peanut butter flavor, then Buckeye Brownies are about to become your new favorite treat. These decadent brownies combine the classic flavors of chocolate and peanut butter in a way that is both indulgent and utterly satisfying. Picture a fudgy brownie base topped with a creamy peanut butter layer and a rich chocolate ganache—it’s the ultimate dessert for any occasion!
Why It Deserves a Spot

Buckeye Brownies deserve a spot in your dessert repertoire because they are not only incredibly delicious but also easy to make. The combination of chocolate and peanut butter is a timeless classic that appeals to both kids and adults alike. Whether you’re hosting a party, celebrating a birthday, or simply treating yourself after a long day, these brownies will impress everyone around you. Plus, they can be made ahead of time and stored for later, making them a perfect make-ahead dessert.
What You’ll Need
To whip up these delightful Buckeye Brownies, gather the following ingredients:
- 1 cup (113g) unsalted butter, melted
- 2 tablespoons (30ml) vegetable oil
- 1 ½ cups (267g) granulated sugar
- ½ cup (54g) natural unsweetened cocoa powder
- 2 large eggs
- 1 teaspoon vanilla extract
- ½ teaspoon salt
- ¾ cup (62g) all-purpose flour
- 20 Nutter Butter Cookies (or any peanut butter sandwich cookie)
- 5 ounces (142g) cream cheese, softened
- 1 cup (170g) chocolate chips
- 1 tablespoon (16g) peanut butter (shelf-stable; not natural)
Equipment & Tools
Before you start baking, make sure you have the following equipment and tools handy:
- Mixing bowls: For combining ingredients.
- Whisk: To incorporate the wet ingredients smoothly.
- Rubber spatula: For folding in flour and spreading layers.
- 9×13 inch baking pan: Perfect size for brownies.
- Microwave-safe bowl: For melting chocolate and butter.
- Cooling rack: To cool the brownies after baking.
Build Buckeye Brownies Step by Step

Step 1: Preheat Your Oven
Begin by preheating your oven to 350°F (175°C). This ensures even baking for your brownies.
Step 2: Prepare the Baking Pan
Line your 9×13 inch baking pan with parchment paper, allowing some overhang for easy removal later. Lightly grease the paper to prevent sticking.
Step 3: Make the Brownie Batter
In a large mixing bowl, whisk together the melted butter, vegetable oil, and granulated sugar until well combined. Then, mix in the cocoa powder, eggs, vanilla extract, and salt until the mixture is smooth. Finally, fold in the all-purpose flour until just combined. Be careful not to overmix.
Step 4: Bake the Brownies
Pour the brownie batter into the prepared pan, using a spatula to spread it evenly. Bake for 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Allow the brownies to cool in the pan on a wire rack.
Step 5: Prepare the Peanut Butter Layer
While the brownies are cooling, crush the Nutter Butter cookies into fine crumbs using a food processor or a zip-top bag and a rolling pin. In a mixing bowl, combine the crushed cookies with the softened cream cheese and 1 tablespoon of peanut butter. Mix until well combined and smooth.
Step 6: Assemble the Brownies
Once the brownies have cooled, spread the peanut butter mixture evenly over the top. Use a spatula to ensure an even layer that covers all the brownie base.
Step 7: Make the Chocolate Ganache
In a microwave-safe bowl, combine the chocolate chips and a tablespoon of peanut butter. Microwave in 30-second intervals, stirring in between, until the chocolate is completely melted and smooth. Pour the ganache over the peanut butter layer, spreading it evenly to cover.
Step 8: Chill and Cut
Refrigerate the assembled brownies for at least 1 hour to let the layers firm up. Once set, lift the brownies out of the pan using the parchment overhang and cut them into squares.
Ingredient Flex Options

Feel free to customize your Buckeye Brownies with these ingredient flex options:
- Use gluten-free all-purpose flour for a gluten-free version.
- Swap coconut oil for vegetable oil for a different flavor profile.
- Try dark chocolate chips instead of semi-sweet for a richer taste.
- Add chopped nuts to the brownie batter for extra crunch.
Don’t Do This
To ensure your Buckeye Brownies turn out perfectly, avoid these common mistakes:
- Don’t overmix the brownie batter; this can lead to dense brownies.
- Don’t skip the cooling time; cutting the brownies too early can result in messy squares.
- Don’t use natural peanut butter for the ganache; it can alter the texture.
- Don’t forget to line and grease the pan; this will help with easy removal.
Cooling, Storing & Rewarming
To maintain the best texture and flavor, follow these tips:
Allow the brownies to cool completely before cutting to prevent them from crumbling. Store any leftover brownies in an airtight container in the refrigerator for up to one week. If you want to enjoy them warm, pop them in the microwave for about 10-15 seconds before serving.
Popular Questions
Can I use other types of cookies for the crust?
Absolutely! While Nutter Butter cookies are classic, feel free to experiment with other peanut butter sandwich cookies or even chocolate cookies for a different flavor.
How do I know when the brownies are done baking?
The brownies are done when a toothpick inserted in the center comes out with a few moist crumbs. If it comes out completely clean, they may be overbaked.
Can I freeze Buckeye Brownies?
Yes! To freeze, wrap the brownies tightly in plastic wrap and then foil. They can be frozen for up to three months. Thaw in the refrigerator before enjoying.
What can I serve with Buckeye Brownies?
These brownies are delicious on their own, but they pair wonderfully with a scoop of vanilla ice cream or a drizzle of chocolate sauce for an extra indulgent dessert.
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Save & Share
If you love these Buckeye Brownies, be sure to share the recipe with your friends and family! They’ll thank you for introducing them to this incredible dessert. Snap a picture when you make them and tag your favorite food bloggers, or simply share the recipe on your social media to spread the joy of baking!
With their rich chocolate base, creamy peanut butter filling, and luscious ganache topping, Buckeye Brownies are sure to become a cherished recipe in your collection. Happy baking!

Buckeye Brownies
Ingredients
For the Brownies:
- 1 cup unsalted butter melted
- 2 tablespoons vegetable oil
- 1.5 cups granulated sugar
- 0.5 cup natural unsweetened cocoa powder
- 2 large eggs
- 1 teaspoon vanilla extract
- 0.5 teaspoon salt
- 0.75 cup all-purpose flour
For the Peanut Butter Layer:
- 20 pieces Nutter Butter Cookies or any peanut butter sandwich cookie
- 5 ounces cream cheese softened
- 1 cup chocolate chips
- 1 tablespoon peanut butter shelf-stable; not natural
Instructions
Instructions:
- Preheat your oven to 350°F (175°C).
- Line your 9x13 inch baking pan with parchment paper, lightly grease the paper.
- In a large mixing bowl, whisk together the melted butter, vegetable oil, and sugar until combined. Mix in cocoa powder, eggs, vanilla extract, and salt. Fold in flour until just combined.
- Pour the batter into the prepared pan and bake for 25-30 minutes. Cool in the pan on a wire rack.
- Crush the Nutter Butter cookies into fine crumbs. Mix with cream cheese and peanut butter until smooth.
- Spread the peanut butter mixture over the cooled brownies.
- Combine chocolate chips and peanut butter in a microwave-safe bowl. Melt in 30-second intervals, stirring until smooth. Pour over peanut butter layer.
- Refrigerate for at least 1 hour, then cut into squares.
Equipment
- Mixing bowls
- Whisk
- Rubber spatula
- 9x13 inch Baking Pan
- Microwave-safe Bowl
- Cooling rack
Notes
- Allow brownies to cool completely before cutting to avoid crumbling.
- Store leftovers in an airtight container in the refrigerator for up to a week.
- For warm brownies, microwave for 10-15 seconds before serving.
