Blend:

4 c. flour
2 1/4 c. light brown sugar
1 c. shortening

Set aside 1 cup of above crumbs. Mix:

2 c. boiling water
1 c. molasses
2 tsp. baking soda
Remaining crumbs

Pour flour mixture into greased and floured 9 x 13 inch pan. (Reserve 1 cup of that mixture for top crumbs.) Add molasses mixture to top. Sprinkle with reserved crumbs. Bake at 350 degrees for 40-45 minutes.