01 -
Preheat oven to 350°F (175°C). Spray a 9x13-inch baking pan with nonstick cooking spray.
02 -
Prepare 1 box chocolate cake mix with ingredients specified on the packaging (eggs, oil, and water). Bake according to package directions.
03 -
Once the cake is baked, allow it to cool for about 10 minutes. Use the handle of a wooden spoon to poke holes all over the cake, approximately 1-inch apart.
04 -
In a medium-sized bowl, whisk together 3 cups of milk and 2 (4-ounce) packages Instant Oreo pudding until most lumps are removed, leaving some Oreo pieces intact.
05 -
Pour the pudding mixture over the cake, aiming to fill the holes. Spread evenly with a spoon and gently push the pudding into the holes.
06 -
Place the cake in the refrigerator and allow it to cool completely, about 1 hour.
07 -
Spread an 8-ounce tub of thawed whipped topping over the pudding layer evenly.
08 -
Top the cake with crushed Oreo cookies. Slice and serve.