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No-Bake Lemon Eclair Cake

Sophia
No-Bake Lemon Eclair Cake delivers classic creamy eclair flavor with graham crackers, lemon pudding, and whipped cream. The crackers soften into tender cake-like layers in the refrigerator.
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Prep Time 20 minutes
Total Time 4 minutes
Servings 12
Calories 420 kcal

Ingredients
  

  • 2 packs graham crackers standard honey flavor works best, but cinnamon is a fun twist
  • 2 cups heavy cream cold
  • 2 cups powdered sugar
  • 2 cups lemon pudding mix usually this equals two 3.4-ounce boxes, but check your packaging; instant pudding is required, not cook-and-serve
  • 4 cups milk cold, preferably whole milk for richness
  • 1 cup whipped topping like Cool Whip, thawed
  • 2 lemons lemon zest plus more for garnish

Instructions
 

  • Prepare the Lemon Pudding: In a large mixing bowl, combine the lemon pudding mix and the 4 cups of milk. Use a whisk to beat the mixture vigorously for about 2 minutes, or until it begins to thicken significantly. Let it sit for exactly 5 minutes. This allows the starches and gums in the instant pudding to fully activate and set up into a stable base.
  • Make the Whipped Cream Mixture: In a separate chilled bowl, pour the heavy cream and powdered sugar. Using a hand mixer or a stand mixer with a whisk attachment, beat on medium-high speed until stiff peaks form. This means when you lift the beater, the cream stands straight up without drooping. Gently fold in the whipped topping and the lemon zest. Folding is crucial here; you want to keep the air in the cream so the final layer is light and fluffy, not dense.
  • Start the Base Layer: Select a 9x13 inch baking dish. A glass dish is ideal because you can see the beautiful layers. Arrange a single layer of graham crackers at the bottom. You may need to break some crackers to fit the corners perfectly. Do not worry if there are small gaps.
  • Add the First Fillings: Spread half of the prepared lemon pudding evenly over the graham crackers. Use a spatula or the back of a spoon to push it to the edges. Next, carefully spread half of the whipped cream mixture over the pudding layer.
  • Repeat the Layers: Add another full layer of graham crackers on top of the cream. Press down very gently to ensure even contact. Spread the remaining lemon pudding over this second layer of crackers. Finish by topping with the remaining whipped cream mixture, smoothing it into a beautiful, even surface.
  • Chill the Cake: Cover the dish tightly with plastic wrap. This is the most important step. Refrigerate for at least 4 hours. However, overnight is truly best. During this time, the moisture from the fillings will soften the graham crackers, giving them that signature "eclair" cake texture that cuts perfectly with a fork.
  • Serve: Just before serving, sprinkle a generous amount of fresh lemon zest over the top. This adds a pop of color and a burst of aromatic oil on the surface. Slice into squares and serve chilled.

Notes

Use instant pudding, not cook-and-serve. Chill at least 4 hours; overnight is best. Store covered in refrigerator up to 3-4 days.