4 c. flour
2 c. brown sugar
3/4 c. shortening (or oil)

Mix together and save 1 cup for top. 2 c. boiling water 1 tbsp. baking soda 1 tsp. vanilla

Mix together then add crumb mixture and mix again. It will look "sloppy". Pour into greased 9x13 inch pan. Pour crumbs on top. Bake at 350 degrees for 45 minutes.