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This No-Bake Key Lime Eclair Dessert is a cross between an easy key lime pie, lime lush dessert, and key lime icebox cake! It really does taste like an éclair, but without all the work and with all the key lime flavor.

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One slice of key lime eclair on a plate topped with lime wedges

What is Key Lime Éclair

This key lime no bake eclair is what happens when you combine an icebox cake with a trifle, eclair, and no-bake lush dessert.

Instead of chocolate, this is a key lime eclair dessert. It’s basically a layered dessert (like a key lime trifle) with a creamy filling (similar to an eclair) that’s flavored with lime (like key lime pie!), and graham crackers that add to the whole eclair flavor.

This no-bake eclair is so much easier than a regular one. You don’t have to make the pastry, bake anything, and you don’t have to temper eggs to make the pastry cream.

Instead, we’re using graham crackers, a key lime pudding, and Cool Whip to make an eclair-tasting dessert that is way less work. Emphasis on “way less!”

This easy eclair dessert is just that – refreshing and light! It really is the perfect summer dessert.

VIDEO: How to make Key Lime Lush

Ingredients in Lime Lush Dessert

  • Instant vanilla pudding mix
  • Milk
  • Key lime juice
  • Lime zest
  • Graham crackers
  • Cool Whip
  • Sliced limes or lime zest for decorating

How to make Key Lime Eclair Dessert

1. Whisk the pudding mix and milk in a bowl. Let it sit until it’s almost set, and then whisk in the lime juice and zest. Fold Cool Whip into the éclair pudding.

2. Place a single layer of graham crackers in the bottom of an 8 or 9” baking pan. Break the crackers, if needed, to make them fit. The whole bottom of the pan should be covered.

3. Spread 1/3 of the pudding filling over the top of the crackers. Top the filling with more crackers and continue layering the two until you end up with a layer of graham crackers on top. I usually get four layers total.

4. Frost the top with the rest of the whipped topping. Cover and chill the eclair dessert for at least four hours or, ideally, overnight.

5. Before serving it, decorate the top with sliced limes and/or lime zest, if desired.

Key lime eclair dessert in glass baking dish with lime wedges on top

How to Store Eclair Lush

Keep the lime eclair lush in the refrigerator until you’re ready to serve it. Leftovers will keep in an airtight container for two to three days.

Expert Tips

  • You can juice key limes yourself or do what I do: buy key lime juice! For the zest, you can use regular limes.
  • I like to add lime juice to the vanilla pudding because it tastes great! If you don’t want to deal with lime juice, you can substitute key lime instant pudding jello for the vanilla pudding.
  • Be sure to buy large graham crackers and not graham cracker cookies or crumbs.
  • The longer you chill the lime lush dessert, the softer the graham crackers will be, making it easier to slice. I highly recommend making it a day in advance so it can chill and set overnight.
  • You can use homemade whipped cream instead of Cool Whip, but it doesn’t hold up as well. After a day or so, the whipped cream will start to weep and make the eclair dessert soggy.
  • Don’t love lime? You can make this recipe with lemon instead!
One slice of key lime eclair on a plate topped with lime wedges missing one corner bite

More No Bake Desserts Perfect for Summer

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Easy No Bake Key Lime Eclair on a white plate with a fork

No Bake Key Lime Eclair

4.53 from 34 votes
No Bake Key Lime Eclair – this easy no bake recipe is like key lime pie in the form of an easy eclair! It really does taste like an eclair recipe but without all the work and all the key lime flavor.
Prep Time 20 minutes
Chill Time 4 hours
Total Time 4 hours 20 minutes
Yield 9 servings
Serving Size 1 serving


  • 1 3.4 ounces package vanilla instant pudding mix
  • 1 cup milk
  • 2 tablespoons key lime juice
  • 1 tablespoon lime zest
  • 16 full Graham Cracker sheets
  • 16 ounces cool whip divided
  • Limes or lime zest for decoration optional


  • Whisk pudding and milk, let sit until mostly set. Whisk in lime juice and zest, then fold in one tub (8 ounces) whipped topping.
  • Line the bottom of an 8” or 9” square pan with graham crackers (break the sheets to fit). Place 1/3 of the pudding mixture on top and evenly spread it out. Top with more graham crackers, more pudding, etc, for 3 layers of pudding and 4 layers of graham crackers. (You will end with graham crackers on top.)
  • Frost the top with more whipped topping. Cover and chill at least 4 hours or overnight. Decorate with lime slices and/or zest if desired. Store loosely covered in the refrigerator.

Recipe Nutrition

Serving: 1serving | Calories: 123kcal | Carbohydrates: 21g | Protein: 3g | Fat: 3g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 1g | Cholesterol: 3mg | Sodium: 175mg | Potassium: 89mg | Fiber: 1g | Sugar: 7g | Vitamin A: 46IU | Vitamin C: 1mg | Calcium: 54mg | Iron: 1mg
Nutritional information not guaranteed to be accurate
Course Dessert
Cuisine American
One slice of key lime eclair on a plate topped with lime wedges

This No-Bake Key Lime Éclair Dessert is a cross between an easy key lime pie, lime lush dessert, and key lime icebox cake!

Last Updated on May 30, 2022

Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

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Recipe Rating


  1. Ohhh yes just made this!! AWESOME ❤️

    Thank you SO much for sharing …

    Very easy, & areal pleaser!! Guard this until set!

    It’s a keeper ?

  2. Very easy and delicious. I purchased the real deal, Key Lime Juice. This is a covered dish favorite. However I used 1/2 cup of lime juice. { Joe and Nellies} The 2 T did nothing to flavor the mix.
    Other than that it is perfect. I have had to share my recipe!

  3. I’m going to go for this for a small dinner party this weekend. I generally make my custard from scratch for puddings, pies, etc. It’s pretty creamy but never as solidified as jello pudding. Do you think this would be thick enough for the eclair? Also make homemade whipped cream as cool whip leaves an industrial taste in my desserts. Advice?

  4. Sorry! We tried the Key Lime Eclair recipe and it was actually very bland! I wonder if we had bought the actual Key Lime Juice you suggested would have been better. We used freshly squeezed juice from actual limes. Disappointing!

    1. Well yes, that juice is the best. I would try it with what’s called for in the recipe for best results.

    2. Hey Karen,
      Key lime juice is a completely different taste then regular limes. I use Joe & Nellie’s Key Lime juice. Awesome!
      You may have to ask for it before you go hunting in the store. My store moved it to a department that I never would have thought of. We think that it should be with the baking stuff, right? Always ask. If they don’t have Joe & Nellies brand, ask for any key lime juice. If they don’t have it you can order joe & Nellies and I’m sure many others. Or, ask where they think that you could find it. Sometimes Kitchen stores carry Key lime juice. You may have to google … Have fun! Karen 🙂

  5. I have a question. Does the pudding have to be cooked. If not how long does it take to set. i’m making it now.

  6. This eclair looks so yummy! Anything citrus makes me happy. And a big 4th of July bash sounds so fun. That’s actually my birthday and I love it!

  7. My future father-in-law LOVES key lime pie and I’m ashamed to say I’ve never tasted it. Ever. But seeing how easy it is to make this no bake dessert, now I feel like there are no excuses to not have it! I’m also eyeing up that key lime pie cheesecake of yours for future reference!!!

  8. I have a few icebox cake recipes but have never tried an eclair cake. My icebox cakes are made with pudding, cool whip, and graham crackers so I am thinking they are pretty close? I know you wrote about the differences but as a food blogger you these little details matter…lol

    Best weekend I have had all year, for sure. And THANK YOU!!! I am sure you are exhausted. And I wish I was in town for your Fourth of July party! Sounds epic!