1/3 c. cocoa
1 c. sugar
1 stick butter
1/4 c. milk
1 tsp. vanilla
2 pkg. sm. instant vanilla pudding
3 c. milk
1 (8 oz.) container Cool Whip
Graham crackers

Mix cocoa, sugar, butter, and milk; bring to a boil. Boil 1 minute; remove from heat; add vanilla, set aside. Mix pudding with milk; fold in Cool Whip. Layer graham crackers, 1/2 pudding mix. Repeat, ending with graham crackers. Pour cooled icing over top. Refrigerate overnight.