Date Coffee Cake
["1/2 c. ripe banana, mashed with fork", "1/3 c. softened butter", "3 large eggs", "1 tsp. vanilla extract", "1 1/4 c. water", "3 c. unbleached flour", "1 tsp. baking soda", "2 tsp. baking powder", "1/2 c. chopped dates"]
["Beat together bananas and butter until creamy. Add eggs, vanilla extract and water; beat. Add all the rest and beat well."]
["banana", "butter", "eggs", "vanilla extract", "water", "flour", "baking soda", "baking powder", "dates"]