• 1/2 cup butter
• 1/2 cup sugar
• 1/2 cup packed brown sugar
• 1/2 cup cocoa powder
• 2 eggs
• 1/2 cup all-purpose flour
• 1 teaspoon baking powder
• 1 teaspoon vanilla extract
• 12 Oreo cookies, crushed
• vanilla frosting
• 6 Oreo cookies, crushed

Combine butter, both sugars, and cocoa powder in a large mixing bowl until thoroughly blended. Add one egg at a time beating each one into the mixture. Combine flour and baking powder in a small bowl. Then add to the batter. Stir in the vanilla and the 12 crushed cookies.

Pour mixture into a greased baking pan. Bake at 350° for 25 minutes. A toothpick inserted in the center should come out with moist bits. Cool the pan on a rack.

After cooling, if desired, top with vanilla frosting. Sprinkle remaining crushed cookies over the top. Cut into bars and serve.