In a mixing bowl, cream butter, powdered sugar, cocoa, and vanilla. Add enough ... be spread over brownies. In a pan melt ... Combine flour, baking powder, and salt and gradually ... clean. Cool before frosting.
Heat oven to 350°F. Grease ... each addition. Add cocoa; beat until well blended. Add flour, baking powder and salt; beat well. Stir ... minutes or until brownies begin to pull away from ... 1 3/4 cups frosting.