mashed banana (2 large or 3 small bananas)
1Heat oven to 350 degrees F. Generously coat a 9"X13" nonstick baking pan with cooking spray. Set aside.
2In a large bowl, mix together (by hand) the margarine, butter and sugar. Mix well. Add the eggs and vanilla and beat until fluffy.
3Add the mashed bananas to the margarine mixture and mix well.
4In a separate bowl, combine the flour, baking powder, baking soda and salt.
5Add the flour alternately with the buttermilk, ending with the flour mixture. Mix just until smooth after each addition.
6Transfer to the prepared baking pan. Bake for 35-45 minutes or until cake springs back when tested with fingertip.
7Dust with confectioner's sugar or ice with your favorite frosting. (I like frost with peanut butter icing. Here's the link to the recipe:
8TIP: If you don;t have buttermilk substitute a mixture of 3/4 cup whole milk with 1/2 teaspoon vinegar or lemon juice added.