1/2 c. cocoa
1/4 c. sugar
1/4 c. water
1 tsp. vanilla
1 (12 oz.) container Cool Whip

Mix above ingredients together well. Arrange 3 graham crackers side by side (long sides touching). Spread with the Cool Whip. Add another layer of graham crackers, then Cool Whip. Continue until you have enough of Cool Whip left to spread on the sides. Refrigerate overnight.

Make this a day before you want it.