Peppermint Pattie Brownies

I made these scrumptious brownies around Christmas time and received lots of compliments!

24 Small York Peppermint Patties
1 1/2 C. butter or margarine, melted
3 C. sugar
1 tsp. vanilla extract
5 eggs
2 C. all-purpose flour
1 C. cocoa powder
1 tsp. baking powder
1 tsp. salt

1.) Heat oven to 350 (325 if dark, non-stick or glass pan). Remove wrappers from patties. Grease a 9x13 baking pan.
2.) Stir together butter, sugar and vanilla in a large bowl. Add eggs; beat until well blended. Stir in flour, cocoa, baking powder and salt; blend well. Reserve 2 C. batter. Spread remaining batter in prepared pan.
3.) Arrange patties about 1/2 inch apart in a single layer over batter. Spread reserved batter over patties.
4.) Bake 50-55 minutes or until brownies begin to pull away from sides of pan. Cool completely, in pan, on wire rack; cut into squares.