1 box 8x8 size brownie mix
1/2 cup creamy peanut butter
12 cupcake liners
Follow directions on the brownie mix box. Spread peanut butter over tops of Oreos and make stacks of two. Place them into each lined cup in the muffin tin.
Spoon about 2 tablespoons of brownie batter on top of each stack and let run down the sides. Use any extra batter in another baking tin for brownies.
Bake for 18-20 minutes until brownies are cooked through. Let cool completely, then serve.