1 Duncan Hines yellow cake mix
3/4 lb. butter
4 c. flour
1 c. sugar
1 tbsp. cinnamon

Follow directions on cake mix package and bake in 17 1/4" x 11 3/8" x 2 1/4" pa. Bake for 20 minutes. While cake is in oven, melt butter. Mix flour, sugar and cinnamon. Add melted butter to this and crumble it into crumbs. Take cake out after 20 minutes. Pour this crumb mixture over it. Put back into oven for 20 minutes. When cake cools, put powdered sugar over it.