1/2 cup shortening
1 1/2 cups sugar
2 eggs
1 teaspoon vanilla extract
1 cup mashed ripe bananas
1/4 cup buttermilk
2 cups all-purpose flour
1 teaspoon baking powder
3/4 teaspoon baking soda
1/2 teaspoon salt
FROSTING:
1/2 cup butter or margarine, softened
2 1/2 cups confectioners' sugar
3 tablespoons milk

In a large mixing bowl, cream shortening and sugar. Add the eggs, vanilla, bananas and buttermilk. Combine the flour, baking powder, baking soda and salt; add to banana mixture. Fill 18 paper-lined muffin cups two-thirds full.
Bake at 350 degrees F for 15-20 minutes or until a toothpick comes out clean. Remove to wire racks to cool completely. In a small mixing bowl, cream the butter, sugar and enough milk to achieve desired spreading consistency. Frost cupcakes.