heat oven to 350?. lightly grease 8x8x2 in pan

stir together water, egg, oil, and cake mix until moistened

spoon 1/2 of batter into pan and spread evenly

sprinkle 1/2 of the topping over batter

drop remaining batter in small spoonfuls over topping layer and spread to cover

sprinkle remaining topping evenly over batter

bake for 33-38 minutes or until cake edges are light golden brown

cool 5-10 minutes before cutting