Ingredients

Cake

* 1 (18 1/4 ounce) box butter recipe cake mix
* 1/4 cup butter, softened
* 4 large eggs
* 1 cup water

Crumb Topping

* 1 1/2 cups butter (VERY SOFT-almost melted)
* 3 cups flour
* 1 cup sugar
* 3 teaspoons vanilla
* 3 teaspoons cinnamon

Directions

1.  Grease and flour a cookie sheet with sides (11 x 17 or 10 1/2 x 15) just watch the time.
2.  Mix cake using above ingredients.
3.  Spread in cookie sheet.
4.  Bake 350° for 20 minutes (20 minutes is the time for the 10 1/2 x 15 pan), so a little less time if you are using the bigger pan.
5.  I like the 11 x 17 pan.
6.  Crumbs: Add ingredients to bowl and mix together.
7.  Spread in chunks covering cake.
8.  Bake 15 minutes more.
9.  Cool.
10.  Sprinkle with powdered sugar.