Prepare a chocolate cake mix for 9 X 13 size. Grease and flour 2 - 8” spring form pans. Divide batter equally between pans. Bake at 350 F for 15 - 18 minutes or until toothpick comes out clean. Cool.
5 TBSP flour
1 c milk
In a pot, whisk together flour and milk until it bubbles and turns thick, cool. In a separate bowl, cream together:
1/2 c shortening
1/2 c margarine
1 c sugar
1/4 tsp salt
Add shortening mixture to cooled milk and flour mixture. Beat well for 8 minutes on high. Add 2 tsp vanilla.
Carefully cut cooled cakes in half horizontally. Spread 1/3 of filling on bottom layer. Repeat 2 more times.
6 TBSP milk
6 TBSP margarine
1 1/2 c sugar
Boil for 3 minutes. Add 1 cup milk chocolate chip cookies. Spread quickly over dessert.