Creating the No Bake Lemon Eclair Cake is simple and straightforward. Just follow these steps:

1. Prepare the Pudding: In a large mixing bowl, combine the cold milk and instant lemon pudding mix. Whisk together until well blended and thickened.
2. Add Zest and Juice: Stir in the fresh lemon juice, lemon zest, and vanilla extract until fully incorporated.
3. Fold in Whipped Topping: Gently fold in the thawed whipped topping until the mixture is smooth and creamy.
4. Layer the Graham Crackers: In a 9×13 inch baking dish, arrange a layer of graham crackers at the bottom.
5. Spread the Pudding: Pour half of the lemon pudding mixture over the graham crackers, spreading it evenly.
6. Add Another Layer of Crackers: Place another layer of graham crackers on top of the pudding mixture.
7. Repeat the Process: Pour the remaining lemon pudding mixture over the second layer of graham crackers, spreading it evenly.
8. Top with Crackers: Finally, add a third layer of graham crackers on top.
9. Prepare the Frosting: In a bowl, mix the powdered sugar with a little milk until it reaches a drizzling consistency. Drizzle this over the top layer of graham crackers.
10. Chill: Cover the dish with plastic wrap and refrigerate for at least 4 hours or overnight for best results.

Following these steps will ensure that your No Bake Lemon Eclair Cake turns out perfectly, with all the flavors melding beautifully together.