Bake chocolate cake according to box instructions. (9 x 13" pan) Once removed from oven, poke holes in the cake with a straw or end of a wood spoon (all over). Mix the two boxes of instant pudding with four cups of milk. Pour all over the cake; it will seep into the holes in the cake. Crush the package of Oreo cookies very well and sprinkle all over the top of the pudding. ENJOY!!