Here is what you need to make it (plus an container of cool whip and a few oreo cookies to crumble on the top).
Prepare and bake cake according to package directions. When you remove it from the oven, poke holes all over the cake while still warm. Prepare the pudding mix and allow to sit for just a minute or two, no longer, and pour over the warm cake.
Allow to sit on counter for about 10 minutes and then place in refrig. to cool. (Approx. 3 hours, but ideally let sit over night).
Once it is cool, top with Cool Whip and crumbled Oreos.
1 Box Devil's Food Cake Mix + ingred. to make the cake
2 Boxes (4 oz. size) of Instant Oreo Pudding Mix
4 C. Milk
1 Tub of Cool Whip
Approx. 20 Oreo Cookies - coarsely chopped
DIRECTIONS: Prepare and bake cake mix according to package directions. Remove cake from oven to cooling rack. Poke holes all over the cake. Mix pudding with milk. Allow to sit for 2 minutes. Pour pudding mix over the warm cake. Allow to sit for 10 minutes. Place in refrig. and allow to cool and set up overnight. Top with Cool Whip and crumbled oreos. Enjoy!!