In large bowl, combine eggs, oil, granulated sugar and brown sugar. With electric mixer, beat until smooth and creamy, about 1 minute. Add bananas, pumpkin or applesauce; beat until blended in, about 30 seconds. Mix together flour, baking powder, soda, salt and spices (if desired, omit spices for banana version): stir in a low speed until blended, about 30 seconds. Pour into greased and floured 8 or 9 inch square cake pan. Bake for 40 - 45 minutes or until tester comes out clean.

FROSTINGS
Simple Buttercream Frosting: In bowl, combine 2 tbsp. softened butter, 1 cup icing sugar, l tbsp cream or milk and 1/2 tsp vanilla. Beat with electric mixer until smooth. If too thins, add a little more icing sugar; if too thick, add a little more cream or milk.

Cream Cheese Frosting: With electric mixer, beat together 4 oz softened cream cheese. 2 tbsp softened butter and 1 tsp vanilla. Gradually beat in enough icing sugar about 1-1/2 cups to give smooth, spreadable consistency.