Fudgy dark chocolate cookies studded with chocolate chunks, topped with creamy peanut butter frosting and finished with silky chocolate ganache.
Why you’ll love these buckeye cookies
- Intensely chocolatey and indulgent — perfect for peanut butter and chocolate lovers.
- Simple to make: just a few bowls and basic tools, no long refrigeration required.
- Thin, chewy cookies topped with smooth peanut butter frosting and a glossy dark chocolate ganache.
If you enjoy chocolate and peanut butter together, these cookies deliver that rich, nostalgic pairing in an elegant bite-sized treat. They were adapted from a chocolate cookie base, layered with creamy peanut butter frosting and finished with a silky ganache for contrast in texture and flavor.
Ingredients & Substitutions
- Flour: For best results weigh your flour with a digital scale. If measuring by cup, fluff the flour first, spoon into the cup and level off.
- Sugar: Light brown sugar gives the cookies a moist, caramel note. Reducing sugar will change texture; if you must, reduce sugar in the peanut butter layer and use darker chocolate for the ganache.
- Cocoa powder: Dutch-process or natural unsweetened cocoa both work; dutch-process gives a deeper, smoother flavor.
- Butter: Salted butter balances sweetness; unsalted is fine. Dairy-free butter can be substituted in the cookie dough with good results.
- Eggs: Use large eggs at room temperature for best incorporation.
- Chocolate: Chopped peanut butter cups add texture and pockets of peanut butter. You can also use chocolate chips, chopped chocolate, or chopped peanuts.
- Peanut butter: Use a creamy, stable peanut butter for the frosting. Natural, oil-separated peanut butter may be runnier and affect consistency.
- Powdered sugar: Adds structure and sweetness to the peanut butter frosting; you can slightly reduce it if you prefer less sweetness.
- Dark chocolate: Dark chocolate is recommended for the ganache. If you prefer milk chocolate, reduce the cream by about one tablespoon to maintain the right set.
- Heavy cream: Use full-fat heavy cream (36–40%); it creates a smooth, shiny ganache.
Step-by-Step Instructions
Chocolate Cookies
Step 1: Combine melted butter, brown sugar and eggs. Whisk vigorously for 2–3 minutes until the mixture lightens slightly.
Step 2: Add dry ingredients. Stir in the flour, cocoa powder, baking powder and salt with a rubber spatula, folding until the flour is almost incorporated.
Step 3: Fold in chopped peanut butter cups. Mix until the dough is uniform and chocolate pieces are evenly distributed.
Step 4: Portion the dough. Using a 2-ounce scoop, shape the dough into 14 smooth balls and place them on a lined cookie sheet, leaving space between each.
Step 5: Bake and shape. Bake for about 6–7 minutes, remove the pan and gently tap it on the counter to flatten the cookies slightly. Quickly use a round cutter or similar item to nudge them into a neat round shape, then return to the oven for another 6–7 minutes. Repeat the tap-and-shape after baking and then cool to room temperature.
Chocolate Ganache
Step 1: Warm the cream and pour over the chocolate. Place chopped or chip-style chocolate in a small bowl. Heat cream until it just simmers, then pour over the chocolate and cover. Let sit for a few minutes, then whisk until smooth and glossy.
Step 2: Cool slightly. Let the ganache rest for 10–20 minutes while you prepare the peanut butter frosting so it’s pourable but not too hot.
Peanut Butter Frosting
Step 1: Melt peanut butter and butter. In a small pot over low heat (or in a microwave-safe bowl), warm the peanut butter and butter together until smooth and combined.
Step 2: Add vanilla and powdered sugar. Stir in vanilla and powdered sugar until the frosting is silky and spreadable. Spread a layer of frosting onto each cooled cookie using an offset spatula. Chilling the frosted cookies for about 10 minutes helps the ganache set faster when added.
Step 3: Finish with ganache. Spoon the cooled but still-pourable ganache over the chilled peanut butter frosting. Sprinkle with chopped peanut butter cups and a few flakes of sea salt for contrast.
How to make cookies ahead of time
You can prepare the cookie dough in advance: portion the dough into balls, freeze them until firm, then store in an airtight container in the refrigerator for a few days or in the freezer for several months. Thaw to room temperature before baking and proceed with the recipe.
Alternatively, bake the cookies a day ahead and add the frosting and ganache just before serving for the freshest texture.
How to store buckeye cookies
Let the cookies set for a few hours so the ganache firms. Store in an airtight container at room temperature for 2–3 days, refrigerated up to one week, or frozen for several months. Bring frozen cookies to room temperature before serving for the best flavor and texture.
Frequently Asked Questions
Many cookie recipes adapt well to dairy-free butter. The cookie dough will likely work with a high-quality dairy-free butter substitute. For a dairy-free ganache, consider using full-fat coconut cream in place of heavy cream and a dairy-free chocolate.
You can try a 1:1 gluten-free flour blend in place of all-purpose flour. I recommend blends labeled for one-to-one substitution for the best texture. Results may vary depending on the brand.
Yes. The method scales down easily; the step-by-step photos were taken from a halved batch.
If you try these buckeye cookies and have questions, leave a comment below and I’ll respond there. Your feedback helps improve the recipe for other bakers.
If you make them, a star rating and brief note about what worked or what you adjusted is greatly appreciated.
Happy baking!
Love, B
Cookies