Step 1: Bake the Cake

1. Preheat the oven to 350°F (or as directed on the cake mix box).
2. Grease a 9×13-inch baking pan.
3. Prepare the chocolate cake batter according to the package instructions.
4. Pour the batter into the pan and bake as directed (usually 25-30 minutes).
5. Let the cake cool for 5-10 minutes.

Step 2: Poke the Holes

1. While the cake is still warm, use the end of a wooden spoon to poke holes all over the cake.

Step 3: Prepare the Pudding

1. In a mixing bowl, whisk together cookies and cream pudding mix and 2 cups of cold milk for 1 minute until slightly thickened.

Step 4: Fill the Cake

1. Set aside ½ cup of pudding for the topping.
2. Pour the remaining pudding over the cake, ensuring it fills the holes.
3. Spread evenly with a spatula if needed.
4. Cover the cake with plastic wrap and refrigerate for at least 2 hours.

Step 5: Make the Whipped Topping

1. Fold the reserved ½ cup of pudding into the thawed whipped topping until smooth.

Step 6: Add the Topping

1. Spread the whipped topping mixture evenly over the chilled cake.

Step 7: Finish with Oreos

1. Crush 12 Oreo cookies and sprinkle them over the cake just before serving.