Ingredients:

2 Tbls oil
4 cups flour
1/2 cup sugar
2 1/2 tsp baking powder
1/2 tsp salt
1 egg
1/2 cup milk
2 tsps vanilla
1 cup packed light-brown sugar
1 1/2 tsp ground cinnamon
1 cup (2 sticks) butter, melted and cooled
Powdered sugar for dusting

Procedure:

325 degrees, 9x12 greased and floured pan

Wisk egg, milk, oil and vanilla.  Fold in 1 1/2 cup sifted flour, sugar and baking powder.  Spread into pan; set aside. 


Combine 2 1/2 flour, brown sugar and cinnamon.  Pour melted butter over flour mixture, toss with rubber spatula until large crumbs form.  Sprinkle crumbs over batter.

Bake 10 minutes, rotate and bake 10 minutes more.  Sprinkle with powdered sugar after cooled.