York Peppermint Pattie Brownies

1 1/2 c. butter (3 sticks) melted
3 c. sugar
1 T vanilla
5 eggs
2 c. flour
1 c. Hersheys Cocoa
1 t. baking powder
1 t. salt
24 York Small Peppermint Patties

Preheat the oven to 350 degrees. Stir together butter, sugar, and vanilla. Add the eggs. Stir until blended. Stir in flour, cocoa, baking powder and salt- blend well. Set 2 c. batter aside. Spread the batter into a 13x9 GREASED pan. Unwrap the patties. Arrange in a single layer over the batter at 1/2 an inch apart. Spread the remaining batter over the top. Bake 50-55 minutes, or until the brownies begin to pull away from the sides of the pan. Cool completely.