A delicious combination of a brownie, mint and chocolate ganache topping.   Chocolate Mint Brownies Ingredients Brownies ½ cup butter ½ cup oil 2 cups granulated sugar 4 eggs 2 teaspoons vanilla ¼ teaspoon mint extract ⅔ cup cocoa powder 1 cup all purpose flour ½ teaspoon salt ½ teaspoon baking powder Mint Buttercream ½