Prepare Pudding Mixture: Combine whipped topping, milk, and pudding mix in a bowl. Stir until smooth.

Layer the Cake: In a 13×9-inch pan, layer graham crackers, followed by half of the pudding mixture. Add another layer of graham crackers, the rest of the pudding, and top with graham crackers.

Spread Icing: Spread chocolate frosting on top, covering the cake.

Chill: Refrigerate for at least 4 hours before serving.

Enjoy this delicious, no-bake dessert!