Buckeye Brownies

These Buckeye Brownies are amazing! Rich chocolate brownies topped with a homemade peanut butter filling and chocolate ganache.

If you LOVE Buckeyes you will also love these Buckeye Bars. Much like the original, except there is no dunking each individual piece in chocolate. SO easy and delicious.

Stack of brownies topped with peanut butter filling and ganache on a white plate.

Why this Recipe is Best

Imagine making your own Reese’s peanut butter cup recipe. Smooth and creamy peanut butter dipped in rich chocolate.

A buckeye brownie is that same flavor on top of a fudgy chocolate brownie. Perfection.

The layers.

  • Brownies. Because these brownies have so much going on I usually opt for a boxed mix. But of course you could make my homemade brownies instead!
  • Peanut Butter Filling. This is the best layer. Soft peanut butter combined with butter, vanilla and powdered sugar to create the perfect texture!
  • Ganache. The chocolate ganache is soft enough to sink your teeth into, but not runny that leaves your hands covered in chocolate. You decide if you want dark, milk, or semi-sweet chocolate!

If you love today’s brownies, be sure to try our chocolate peanut butter pie next! Or give our buckeye brownie cookie recipe a try- it’s a copycat Crumbl cookie!

Ingredient Notes

Ingredients needed to make buckeye brownies.
  • Brownie Mix- look for a brownie that can be made in a 13×9 baking dish. You’ll also need the ingredients on the box to make the brownies, usually egg, oil, and water!
  • Peanut Butter- opt for a shelf stable peanut butter, like Skippy or Jif, as they tend to produce the best results.
  • Powdered Sugar- used as a sweetener for the peanut butter layer. We love powdered sugar because it sweetens without creating a grainy texture.
  • Butter- use our guide on how to soften butter quickly.
  • Vanilla- pure vanilla extract is best. Try our homemade vanilla extract, it’s delicious and cost effective!
  • Milk Chocolate & Heavy Whipping Cream- for the ganache on top. A good quality chocolate is best here, semi-sweet works well too.

How to make Buckeye Brownies

Step by step photos showing how to make buckeye brownies.

Brownies. Start by making a batch of brownies in a 13×9 baking dish. You can use a boxed mix or try your hand at homemade. For today’s recipe, a quick batch of boxed brownies is the way I chose to go. Our dark chocolate brownies would make a great base!

PRO TIP: Make sure you line your baking dish with parchment paper before baking. This will allow you to easily lift them out of the pan and slice for serving.

Peanut Butter Filling. While your brownies are baking, make your peanut butter filling. Beat ingredients until combined into a soft “dough.”

Remove brownies from oven and gently drop peanut butter mixture onto top of warm brownies. Use your finger tips to make sure the brownies are completely covered.

For the ganache, in a small microwave safe bowl, combine chocolate chips and heavy whipping cream. Heat for one minute and stir until smooth. Pour over peanut butter layer and spread evenly. 

Chill. Cool completely by refrigerating brownies for 2 hours (or more). Cut into bars while chilled and enjoy!

Peanut butter topped brownie on a plate with a fork and a bite taken out.

More Easy Desserts

Buckeye Brownies

4.55 from 84 votes
By: Aimee
These Buckeye Brownies are amazing! Rich chocolate brownies topped with a homemade peanut butter filling and chocolate ganache.
Prep Time: 15 minutes
Cook Time: 25 minutes
Chill Time: 2 hours
Total Time: 2 hours 40 minutes
Servings: 24 brownies


For the brownies:

  • 1 box brownie mix with ingredients according to package (13×9 size)

For the peanut butter filling:

  • ¾ cup unsalted butter melted
  • 1 ½ cups creamy peanut butter
  • 1 teaspoon vanilla extract
  • 3 cups powdered sugar

For the ganache:

  • 1 package milk chocolate chips 10 ounce
  • 6 Tablespoons heavy cream


  • Prepare brownies according to package directions for a 13×9. Make sure to line your baking dish with parchment paper.
  • While brownies are baking, make peanut butter filling. In a mixing bowl, combined melted butter, peanut butter, vanilla, and powdered sugar. Beat until combined.
  • Remove brownies from oven when done baking. Gently drop peanut butter filling onto top of warm brownies, using fingertips to make sure brownies are completely covered.
  • For the ganache, in a small microwave safe bowl, combine chocolate chips and heavy cream. Heat for one minute. Stir until smooth. Pour over peanut butter layer and spread until evenly distributed.
  • Refrigerate brownies for 2 hours (or more). Cut into bars while chilled. Serve and enjoy!!


  • Peanut butter. I find regular creamy peanut butter works better than natural or sugar free.
  • Storage. Keep these brownies chilled for best results. Store in airtight container for up to 5 days or freeze for up to 3 months.



Serving: 1brownie, Calories: 227kcal, Carbohydrates: 20g, Protein: 4g, Fat: 16g, Saturated Fat: 6g, Polyunsaturated Fat: 8g, Cholesterol: 20mg, Sodium: 83mg, Fiber: 1g, Sugar: 15g
Course: Brownies and Bars
Cuisine: American
Did you make this recipe?Mention @shugarysweets or tag #shugarysweets!

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About Aimee

Aimee is a dessert lover (specifically rice krispie treats), workout enthusiast, self-taught foodie, and recipe creator.

Learn more about Aimee.

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Posted on December 28, 2019

Comments & Reviews

  1. 5 stars
    I made these to celebrate to first OSU football game of the season. I split the recipe into two 8×8 pans instead of one 13×9. Just delicious and the hit of the party!

  2. These were AMAZING! I am an experienced and frequent baker. This recipe has made it into the permanent lineup. Everyone loved them. I do not like freezing anything, baked goods especially but we had a lot left and my husband said he was freezing them and serving as one of many desserts on Thanksgiving. I was skeptical but honestly have to say wrapping them well and freezing them did not change them at all. I used the brownie recipe and they would be terrific standing alone.

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