1 box Duncan Hines yellow cake mix
2 tsp. vanilla
3 eggs
3 sticks butter
1 tsp. baking powder
2 1/2 c. flour
2/3 c. sugar
3 tsp. cinnamon
Pinch of salt
1 1/3 c. milk

In large bowl add box of Duncan Hines yellow cake mix, milk, eggs, baking powder, 1 teaspoon vanilla, 1 stick of butter. Mix together. Pour into 9 x 13 inch greased and floured baking pan. Bake at 350 degrees for about 45 minutes or until golden brown. In another bowl add flour, sugar, 2 sticks butter, 1 teaspoon vanilla, salt and cinnamon. Mix with fork into large crumbs. When cake is done, remove from oven. Sprinkle crumbs on top and bake for another 15 minutes. When cake is done, cool and sprinkle top with confectioner's sugar.