Air Fryer Buckeye Brownies

I love making Air Fryer Buckeye Brownies because they deliver three perfect layers of flavor with way less time than you'd expect from a dessert this impressive. The air fryer gets the brownie base perfectly fudgy and done quickly, then a thick sweet peanut butter filling goes on top, finished with smooth melted chocolate that sets firm and clean. It's the classic buckeye flavor everyone loves but in a bar you can slice, stack, and share. I make them for game day, holiday trays, and bake sales because they travel and hold up beautifully.

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Prep Time: 15

Cook Time: 15

Total Time: 30

Course: Dessert

Cuisine: American

Keyword: Air Fryer Buckeye Brownies

Servings:

Calories: 267kcal

Equipment

Square baking pan 8x8-inch or one that fits in your air fryer greased or lined with
Parchment paper

Ingredients

For the Brownie Mix:

1 package fudge brownie mix 13x9-inch pan size
3 eggs
½ cup butter

For the Buckeye Brownies:

½ cup butter plus 6 tablespoons butter divided
1 cup creamy peanut butter
2 cups confectioners' sugar
6 ounces semisweet or dark chocolate chips

US Customary - Metric

Instructions

Prepare the brownie batter according to the package instructions.
1 package fudge brownie mix, 3 eggs, ½ cup butter
Grease an 8x8-inch baking pan and pour in the batter. Bake in the air fryer at 350ºF (180°C) for 15 minutes (adjust time slightly if needed—check doneness with a toothpick). Let the brownies cool completely in the pan.
In a large microwave-safe bowl, combine ½ cup butter and 1 cup peanut butter. Microwave for 30–60 seconds, until melted. Stir until smooth.
1 cup creamy peanut butter
Add 2 cups confectioners' sugar and mix until fully combined and creamy. Spread evenly over the cooled brownies.
2 cups confectioners' sugar
In another microwave-safe bowl, add 6 tablespoons of butter and chocolate chips. Microwave in 30-second intervals, stirring between each, until melted and smooth.
½ cup butter plus 6 tablespoons butter, 6 ounces semisweet or dark chocolate chips
Pour and spread the chocolate evenly over the peanut butter layer.
Let the brownies sit at room temperature or refrigerate for 30–60 minutes until firm. Cut into squares and enjoy!

Notes

Here are a few tips I've picked up to help you get the best results every time:

Cool the brownies completely: The peanut butter layer needs a fully cooled brownie base to set up properly. Even slightly warm brownies will cause the layer to slide or melt unevenly.

Stir the peanut butter mixture until fully smooth: After microwaving the butter and peanut butter together, stir thoroughly before adding the confectioners' sugar. Any lumps at this stage will show up in the finished layer.

Spread each layer evenly: Use an offset spatula to spread both the peanut butter and chocolate layers all the way to the edges. Uneven layers mean uneven slices.

Melt the chocolate in short intervals: Microwave the butter and chocolate chips in 30-second bursts and stir between each one. Chocolate scorches quickly, and short intervals give you better control over the texture.

Refrigerate before slicing: Let the brownies firm up in the fridge for at least 30 minutes before cutting. A fully set chocolate layer means cleaner, sharper squares.

Store properly: Layer cooled brownies with parchment if stacking in airtight containers, then chill for up to 1 week or keep at room temp for up to 3 days. To freeze, wrap each slice in plastic wrap, then freeze in freezer bags for up to 2 months. Thaw before serving.

Nutrition

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