Triple Decker Key Lime Pie

If you love a refreshing dessert with layers of sweet, tangy, and creamy goodness, this Triple Decker Key Lime Pie is the treat for you. With three unique textures—crunchy graham cracker crust, rich key lime cheesecake, and a light, fluffy lime mousse—this pie is a showstopper for any gathering. It’s a tropical-inspired dessert that brings both flavor and flair to the table.

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Why You’ll Love This Recipe
Three Incredible Layers – Crunch, cream, and fluff in every single bite.
Tropical Flavor – Zesty key lime juice brings a refreshing brightness.
Perfect Make-Ahead Dessert – Chill time enhances the texture and taste.
Impressive Yet Easy – Each layer is simple to make and builds into a stunning pie.
Great for Any Occasion – Summer barbecues, holidays, or anytime you need a dessert that wows.

Ingredients You’ll Need

For the Graham Cracker Crust:

• 1 ½ cups graham cracker crumbs
• ¼ cup granulated sugar
• 6 tbsp unsalted butter (melted)

For the Key Lime Cheesecake Layer:

• 8 oz cream cheese (softened)
• ½ cup sweetened condensed milk
• ⅓ cup key lime juice (fresh or bottled)
• 1 tsp key lime zest
• ½ tsp vanilla extract

For the Lime Mousse Layer:

• 1 cup heavy whipping cream
• ¼ cup powdered sugar
• ¼ cup key lime juice
• 1 tsp key lime zest
• ½ tsp unflavored gelatin
• 1 tbsp water

For the Whipped Cream Topping:

• ¾ cup heavy whipping cream
• 2 tbsp powdered sugar
• ½ tsp vanilla extract
• Lime slices or zest for garnish (optional)

Tools You’ll Need

• 9-inch pie dish
• Mixing bowls
• Electric mixer or hand whisk
• Rubber spatula
• Small saucepan (for gelatin)
• Microplane or zester

Step-by-Step Instructions

Step 1: Prepare the Graham Cracker Crust
Preheat oven to 350°F (175°C).
In a medium bowl, mix graham cracker crumbs, sugar, and melted butter until evenly combined.
Press the mixture firmly into the bottom and up the sides of a 9-inch pie dish.
Bake for 8–10 minutes, then cool completely.

Step 2: Make the Key Lime Cheesecake Layer
In a medium mixing bowl, beat softened cream cheese until smooth and creamy.
Add sweetened condensed milk, key lime juice, zest, and vanilla extract.
Beat until the mixture is smooth and slightly thickened.
Pour into the cooled crust and spread evenly.
Place in the refrigerator while you prepare the next layer.

Step 3: Prepare the Lime Mousse Layer
In a small bowl, stir together the unflavored gelatin and water. Let sit for 5 minutes to bloom.
Meanwhile, whip the heavy cream and powdered sugar in a chilled bowl until soft peaks form.
Heat the bloomed gelatin in the microwave or on the stovetop for just a few seconds until fully dissolved (do not boil).
Stir the dissolved gelatin into the key lime juice and zest.
Gently fold this mixture into the whipped cream until smooth and combined.
Carefully spread the mousse layer over the cheesecake layer.
Chill in the refrigerator for at least 4 hours, or overnight, until fully set.

Step 4: Make the Whipped Cream Topping
In a chilled bowl, whip the heavy cream, powdered sugar, and vanilla extract until medium-stiff peaks form.
Dollop or pipe on top of the chilled pie.
Garnish with lime zest or thin lime slices if desired.

Step 5: Slice and Serve
Use a warm, clean knife to cut neat slices.
Serve chilled and enjoy every creamy, citrusy, and crunchy bite!

Tips for Success
Use Real Key Lime Juice – Bottled is fine, but make sure it’s labeled “key lime” for authentic flavor.
Chill Thoroughly – Each layer benefits from extra time to firm up.
Stiff Whipped Cream – Helps the mousse hold its shape and adds airiness.
Use a Springform Pan – For cleaner edges and easy removal, though a pie dish works perfectly too.
Make Ahead – This pie is even better the next day as the flavors meld together.

Serving Suggestions
Tropical Fruit Salad – Serve with mango, pineapple, and kiwi on the side.
Mint Garnish – A sprig of mint adds a beautiful, fresh touch.
Iced Green Tea – A light, refreshing drink that complements the tart lime.
Toasted Coconut Flakes – Sprinkle on top for extra texture and island vibes.

How to Store & Freeze

Storing:

• Refrigerate: Cover with plastic wrap or store in an airtight container for up to 4 days.

Freezing:

• Freeze the fully assembled pie (without whipped topping) for up to 2 months.
• Thaw overnight in the fridge and top with whipped cream just before serving.

Reheating:

• No reheating needed—this pie is best served cold and fresh from the fridge.

Frequently Asked Questions

1. Can I use regular limes instead of key limes?
Yes! Key limes are more aromatic and tart, but regular limes work just fine.

2. Can I make this without gelatin?
You can skip the gelatin, but the mousse may not set as firmly. Use stabilized whipped cream if available.

3. Is this pie very sweet?
It has a balanced flavor—tangy, creamy, and lightly sweet. Adjust sugar in the whipped cream if you prefer less sweetness.

4. Can I use a pre-made crust?
Absolutely! A store-bought graham crust makes this recipe even quicker.

5. How do I get clean slices?
Use a sharp knife dipped in warm water, and wipe between cuts for neat slices.

Final Thoughts
This Triple Decker Key Lime Pie takes a classic dessert to a whole new level with its dreamy textures and layered flavor. From the buttery graham crust to the zesty lime mousse, every bite is a tropical escape that’s perfect for any season. Whether you’re serving it at a summer party, holiday dinner, or just treating yourself—this pie will steal the show.

Give it a try and share your pie photos and feedback—I’d love to see how your triple-decker masterpiece turns out!

Preparation Time: 20 minutes
Chill Time: 4 hours (minimum)
Cuisine: American

Nutritional Information (Per Serving):
Calories: 390 | Protein: 6g | Carbohydrates: 32g | Fat: 27g | Fiber: 1g | Sodium: 190mg

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