Old-Fashioned Banana Sheet Cake with Frosting

Name: Banana Sheet Cake
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 20
Ingredients: 1 1/2 cups Bananas, ripe; 2 Eggs; 1 tsp Baking soda; 2 3/16 cups Flour; 2 cups Granulated sugar; 2 tsp Vanilla; 1 cup Butter, unsalted; 1/2 cup Milk; 1/4 cup Sour cream