Creating your No-Bake Eclair Cake is an enjoyable process. Follow these simple steps to achieve a fantastic result:

1. Prepare the Pudding: In a large bowl, whisk together the instant vanilla pudding mix and 4 cups of milk until well combined. Allow it to sit for about 5 minutes to thicken.
2. Fold in Whipped Topping: Gently fold in the thawed whipped topping into the pudding mixture until fully integrated. This creates a rich, creamy filling.
3. Layer with Graham Crackers: In a 9×13 inch baking dish, start by placing a layer of graham crackers at the bottom.
4. Add Pudding Mixture: Pour half of the pudding and whipped topping mixture over the layer of graham crackers. Spread it evenly using a spatula.
5. Repeat Layers: Add another layer of graham crackers, followed by the remaining pudding mixture. Finish with one last layer of graham crackers on top.
6. Make the Chocolate Icing: In a separate bowl, combine cocoa powder, powdered sugar, milk, and vanilla extract. Mix until smooth and pourable.
7. Spread the Icing: Pour the chocolate icing over the top layer of graham crackers, spreading it evenly.
8. Chill: Cover the dish with plastic wrap and refrigerate the cake for at least 4 hours. For best results, let it chill overnight.
9. Serve: Once chilled and set, cut into squares and serve to your guests.

These straightforward steps will guide you in creating an incredible No-Bake Eclair Cake that is sure to impress anyone lucky enough to taste it.