Chocolate-Banana-Peanut Butter Delight

2 eggs

3 envelopes (1 oz each) premelted unsweetened baking chocolate

3/4 cup milk

1 teaspoon vanilla

2 cups Gold Medal® all-purpose flour

1 teaspoon baking soda

1/2 teaspoon salt

1/2 cup sour cream

1/2 cup butter or margarine, softened

1/2 cup granulated sugar

1 egg

3/4 cup mashed ripe bananas (1 1/2 medium)

1/4 cup sour cream

1/2 teaspoon banana extract

1 cup Gold Medal® all-purpose flour

1/2 teaspoon baking soda

1/2 teaspoon baking powder

1/4 teaspoon salt

1 cup butter or margarine, softened

1 cup creamy peanut butter

4 cups powdered sugar

1/4 cup milk

1/2 teaspoon vanilla

Peanuts, if desired

Chocolate chips, if desired