1 pkg. Duncan Hines yellow cake mix (butter recipe)

Follow recipe (beat 4 minutes); pour into 12x17 roasting pan. Bake 17 minutes.

CRUMB MIXTURE:

4 sticks butter (melted)
4 c. flour
1 1/3 c. sugar
3 tsp. cinnamon
3 tsp. vanilla

Mix flour, sugar, and cinnamon. Add butter and vanilla. Sprinkle crumb mixture through fingers onto cake. Bake another 17 minutes; cool. Sprinkle with powdered sugar.

NOTE: This makes a large cake. It can be made in two smaller pans. Serve one now, freeze one for later use. Freezes well.