1 Duncan Hines butter cake mix

Follow the directions on the package. Spread on greased and floured cookie sheet with sides. Bake for 20 minutes at 375 degrees.

CRUMB TOPPING:

4 c. flour
2/3 c. sugar
1 c. melted butter
1 tbsp. vanilla
2/3 c. dark brown sugar
1 tbsp. cinnamon
1 stick melted butter

Beat butter and butter with vanilla and let cool. Mix remaining ingredients, add cooled butter mixture. Mix well, crumble and place on top of cake. Bake 20 minutes at 350 degrees. Let cool. Sprinkle with powdered sugar.