Banana Frosted Layer Cake - cooking recipe

Ingredients

1/2 c. soft butter
1 1/2 c. granulated sugar
3 eggs
1 tsp. vanilla
2 1/2 c. cake flour
3/4 tsp. baking powder
3/4 tsp. baking soda
1/2 tsp. salt
1 c. mashed bananas (2 large)
1/3 c. sour cream
1 (8 oz.) container banana-strawberry yogurt, stirred

Preparation

In a large bowl, cream butter and sugar until fluffy.
Add eggs, one at a time, beating thoroughly after each addition.
Add vanilla.