Keto Key Lime Pie Mousse: A Creamy Low-Carb Delight (2025)

Keto Key Lime Pie Mousse is the perfect way to indulge your sweet cravings without stepping off your low-carb path. This velvety, citrusy dessert combines the vibrant tang of key lime with a rich, creamy mousse texture—delivering flavor and satisfaction while keeping carbs in check.

Sticking to a keto diet doesn’t mean giving up dessert. In fact, keto key lime pie mousse proves you can enjoy indulgence without compromise. It’s light, refreshing, and ideal for summer get-togethers or anytime you want a guilt-free sweet treat.

Don’t be afraid to customize it. Add a hint of coconut or a dusting of crushed pecans for a flavor twist. Want more crunch? A keto-friendly graham crust layered underneath the mousse adds texture and a nostalgic pie-like feel.

Creamy keto key lime pie mousse topped with lime zest in a clear glass dessert bowl. — This smooth and creamy keto key lime pie mousse is topped with zesty lime for a refreshing low-carb indulgence.

For flawless results, choose high-quality ingredients and whip your cream until it’s stiff—but not grainy. The result? A cloud-like mousse with zesty lime flavor in every bite. This is more than a dessert—it’s your go-to keto delight.

Table of Contents

Ingredients for keto key lime pie mousse:

Base Ingredients

1 cup of heavy whipping cream – Make sure it’s unsweetened and chilled for the best results, as it will provide the mousse’s creamy texture.
1 cup of cream cheese – This should be softened to room temperature to ensure easy mixing and a smooth consistency.
½ cup of powdered erythritol – A great keto-friendly sweetener that mimics the sweetness of traditional sugar without the extra carbs.
½ cup of fresh key lime juice – For the best flavor, use freshly squeezed juice; bottled versions often contain added sugars.
2 teaspoons of lime zest – This enhances the citrus flavor of the mousse and adds a refreshing brightness to the dish.

Flavor Enhancers

1 teaspoon of vanilla extract – This subtle flavor balances the tartness of the key lime and adds depth to the mousse.
1 tablespoon of gelatin powder (optional) – If you prefer a firmer mousse, particularly if you’re serving it in slices instead of as a spooned dessert, consider adding gelatin. Just dissolve it in two tablespoons of warm water before mixing it in.
Pinch of salt – A small pinch enhances the overall flavor, cutting through the sweetness and balancing the tartness of the lime.

Toppings and Garnishes

Whipped cream (optional) – For serving, you can use additional whipped cream to top each mousse for a richer flavor and presentation.
Extra lime zest – Sprinkle some additional lime zest on top for visual appeal and a burst of citrus aroma.
Fresh berries – Options like raspberries or blackberries make a beautiful garnish that complements the tanginess of the mousse while adding color.

Variations

Chocolate Keto Key Lime Pie Mousse – Fold in two tablespoons of unsweetened cocoa powder for a chocolaty twist that pairs surprisingly well with lime.
Coconut Lime Version – Substitute a third of the cream cheese with coconut cream for a tropical flavor that embodies the essence of a piña colada.

How to prepare keto key lime pie mousse:

Begin by gathering all the necessary ingredients. You will need heavy whipping cream, cream cheese, key lime juice, lime zest, sweetener, and vanilla extract. Ensuring you have everything ready will streamline the process.

Step 1: Whip the Cream

In a large mixing bowl, pour in 1 cup of heavy whipping cream. Use an electric mixer to whip the cream until soft peaks form. This process typically takes about 3 to 5 minutes. Set the whipped cream aside carefully in a clean bowl.

Step 2: Prepare the Cream Cheese

In a separate bowl, add 8 ounces of softened cream cheese. Beat the cream cheese with the mixer until it’s smooth and creamy, about 1 to 2 minutes. This step is crucial for achieving a fluffy mousse texture.

Step 3: Incorporate Sweetener and Flavorings

To the cream cheese, mix in 1/2 cup of your preferred keto-friendly sweetener. This adds sweetness without the carbs. Then, incorporate 1 tablespoon of vanilla extract for flavor. Mix until fully combined.

Step 4: Add Key Lime Juice and Zest

Next, measure and pour in 1/3 cup of fresh key lime juice. Follow that with the zest of one lime for an extra burst of flavor. Blend these ingredients with the cream cheese mixture until fully combined. Pay attention to ensure there are no lumps.

Step 5: Fold in Whipped Cream

Now, take the prepared whipped cream and gently fold it into the cream cheese mixture. Use a spatula to carefully combine the two, taking care not to deflate the whipped cream. This folding technique helps keep the mousse light and airy.

Step 6: Chill the Mousse

Once combined, cover the mousse with plastic wrap or transfer it into a serving dish. Place the bowl in the refrigerator and let it chill for at least 2 hours. This cooling time allows the flavors to meld perfectly.

Step 7: Serve and Enjoy

After chilling, the mousse is ready to serve. Spoon it into individual dessert cups, and consider garnishing with additional lime zest or a dollop of whipped cream. Enjoy your refreshing treat!

Tips for the Perfect Keto Key Lime Pie Mousse

Maintain the Correct Temperature

Maintaining the right temperature is crucial for achieving a smooth texture in your keto key lime pie mousse. Always start with cold ingredients, especially the heavy cream. Chilling your mixing bowl and beaters can also help, as it allows the cream to whip up more easily. Aim to keep your mousse in the fridge for at least 2 hours before serving. This not only firms up the mousse but also enhances the flavors. For an even cooler treat, serve it in chilled glasses.

A single serving of keto key lime mousse in a clear bowl topped with grated lime zest, surrounded by halved limes. — Simple, satisfying, and full of flavor—this keto key lime mousse is your perfect sugar-free treat.

Choose Quality Ingredients

The flavors of your mousse largely depend on the ingredients you select. Opt for fresh key limes for the best taste. If you can’t find them, bottled key lime juice works as a substitute, but ensure it’s from a natural source with no added sugars. Use heavy whipping cream with a high-fat content to achieve that light and airy texture desirable in a mousse. Additionally, select a keto-friendly sweetener like erythritol, stevia, or monk fruit, preferable over conventional sugar for this recipe.

Substitutions for Dietary Restrictions

If you’re catering to specific dietary needs, consider some simple substitutions. For a dairy-free option, replace heavy cream with coconut cream. This swap adds a unique flavor and adheres to a dairy-free diet. Moreover, those allergic to nuts can skip the almond flour crust, or simply enjoy the mousse on its own. For a vegan approach, use aquafaba (the liquid from canned chickpeas) whipped into peaks instead of cream, successfully achieving that light texture.

Flavor Enhancements

Though the keto key lime pie mousse is delightful as is, you can elevate it with a few simple additions. A little lime zest will amplify that zesty flavor without adding carbs. For a tropical twist, consider folding in some fresh berries, which can also enhance the presentation. If you enjoy spice, a hint of finely grated ginger can add an exciting depth to the overall flavor profile.

By following these tips, you’ll ensure that your mousse not only tastes fantastic but also meets various dietary needs. Enjoy crafting this refreshing dessert!

Storage Tips for keto key lime pie mousse:

Keeping your keto key lime pie mousse fresh and tasty requires some simple strategies. Follow these tips to ensure optimal storage conditions and extend the shelf life of your dessert.

Optimal Storage Containers

Use airtight containers to store your mousse. Glass jars work great for this purpose, as they seal tightly and do not absorb odors. If you choose plastic containers, select high-quality, food-safe options that prevent leaks and air exposure.

Maintain Freshness with Refrigeration

Always store your mousse in the refrigerator. Set the temperature to 32°F – 40°F (0°C – 4°C) for optimal preservation. A lower temperature helps slow down spoilage and maintains the creamy texture. Avoid leaving the mousse out at room temperature for over two hours, as this can quickly diminish its quality.

Shelf Life of the Dessert

Consume your mousse within 3 to 5 days for the best flavor and texture. After this time, the ingredients may begin to separate, negatively affecting the taste. Check for any signs of spoilage, such as an off smell or unusual discoloration before consuming. If you notice any, discard the mousse to avoid any health risks.

Freezing Options for Longer Storage

If you need to store your mousse for an extended period, consider freezing it. Portion it into single servings in airtight containers, leaving some space at the top to allow for expansion during freezing. When ready to eat, defrost the mousse in the refrigerator overnight. Avoid refreezing thawed mousse, as this can alter the texture and flavor.

Pro Tips for Reheating

If you find your mousse a bit firmer after freezing, gently stir in a small amount of heavy cream or coconut milk to restore its silky consistency. Use a spatula or a whisk to blend well until you achieve the desired creaminess once again.

By following these guidelines, you can enjoy your keto key lime pie mousse at its best. Maintain freshness for delightful indulgence every time you dive into this delicious dessert!

Related Recipes to Enhance Your Keto Key Lime Pie Mousse Experience

If you’re a fan of keto key lime pie mousse, you’ll love these complementary recipes that stick to your low-carb goals while adding variety and flavor to your dessert lineup.

First, try our Keto Pumpkin Waffles. While waffles may seem like a breakfast item, their warm spices and soft, fluffy texture contrast beautifully with the zesty lime mousse. Serve them together for a brunch-style dessert spread that’s both satisfying and keto-approved.

Next, check out our Keto Cheese Popcorn for a savory-sweet pairing. This cheesy, crunchy snack makes a great follow-up or palate cleanser after indulging in your creamy mousse. It’s also a clever way to balance flavors during a keto dinner party or family gathering.

Don’t miss our Keto Tuna Salad as a light entrée before dessert. The fresh crunch of veggies and the protein-rich tuna help round out a meal anchored by your key lime mousse. This pairing proves that keto meals can be both functional and indulgent.

Looking for inspiration? Try our Keto Bagels as a base for a creative mousse sandwich—yes, you read that right! Toasted keto bagels, lightly buttered, can be layered with mousse and topped with lime zest for a quirky yet delicious twist on dessert sliders.

For something less expected but still aligned with keto, experiment with our Quick Keto Pizza Sauce. While not a dessert, this savory option is ideal for creating a themed dinner menu that ends with a citrusy mousse finale. It adds balance and keeps your taste buds engaged throughout the meal.

These recipes not only stick to your keto lifestyle but also elevate the keto key lime pie mousse experience with new textures, flavors, and meal possibilities. Mix and match to create a satisfying spread for any occasion—without the carbs.

Conclusion:

In summary, keto key lime pie mousse is more than just a dessert—it’s a celebration of flavor and simplicity for anyone living a low-carb lifestyle. Light, creamy, and tangy, this keto key lime pie mousse delivers a refreshing citrus kick without breaking your diet.

One of the best parts of this keto key lime pie mousse recipe is how customizable it is. You can easily adjust the tartness or sweetness by tweaking the lime juice and sweetener levels. That means your keto key lime pie mousse can be as bold or as mellow as you like.

For those who want to add extra texture and visual appeal, top your keto key lime pie mousse with whipped cream, toasted coconut, or a dash of lime zest. These toppings turn your mousse into a picture-perfect keto dessert that’s just as beautiful as it is delicious.

If you enjoy experimenting, try mixing a bit of vanilla into your keto key lime pie mousse or folding in nutrient-rich ingredients like avocado or Greek yogurt. These variations boost the nutrition while keeping everything keto-friendly.

Whether served after dinner or enjoyed as an afternoon pick-me-up, keto key lime pie mousse always satisfies. It’s rich enough to feel indulgent, yet light enough to enjoy guilt-free.

With minimal prep time, a handful of ingredients, and tons of flavor, keto key lime pie mousse earns its spot as a go-to low-carb dessert. Make a big batch and store it in the fridge for when cravings hit—you’ll always have a spoonful of goodness ready to go.

No matter how you serve it, keto key lime pie mousse proves that staying keto doesn’t mean giving up dessert. It’s the ultimate blend of taste, health, and convenience. So grab your ingredients and whip up your next favorite treat—because this keto key lime pie mousse is worth every bite.

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FAQs:

What is keto key lime pie mousse?

Keto key lime pie mousse is a low-carb, creamy dessert inspired by the traditional key lime pie. This delightful treat typically features a blend of healthy fats, such as cream cheese and whipped heavy cream, sweetened with a keto-friendly sweetener. The mixture is infused with fresh lime juice, creating a tart yet sweet flavor reminiscent of the classic pie, but without the high carbohydrate count.

Is keto key lime pie mousse difficult to make?

No, making keto key lime pie mousse is quite simple! The recipe usually involves just a few easy steps: mixing the ingredients until smooth, folding in whipped cream for a light texture, and chilling the dessert to allow the flavors to meld. It is an excellent choice for those who may be new to low-carb baking or cooking, as it requires no complex techniques.

How can I make this dessert more visually appealing?

To enhance the visual appeal of your keto key lime pie mousse, consider serving it in individual glasses or jars. You can also garnish each serving with lime zest, whipped cream, or even a fresh mint leaf for a pop of color. Adding crushed nuts or a sprinkle of graham cracker crumbs can mimic the pie crust and make the dessert look inviting.

Can this mousse be prepared in advance?

Yes, one of the great aspects of keto key lime pie mousse is that it can be made ahead of time. In fact, refrigerating it for a few hours, or even overnight, can help improve the flavors and texture. Just be sure to store it in an airtight container to keep it fresh until you’re ready to serve.

Is this dessert suitable for a gluten-free diet?

Absolutely! Keto key lime pie mousse is inherently gluten-free, as it typically contains no grains or gluten-based ingredients. This makes it an excellent treat for those who are sensitive to gluten or have celiac disease, allowing more people to enjoy this delicious dessert.

What can I substitute for ingredients if I don’t have them on hand?

If you find yourself missing some ingredients, there are several substitutions you can use. For example, if you don’t have cream cheese, mascarpone cheese can work as an alternative. In place of lime juice, lemon juice can provide a similar tartness. Additionally, a different low-carb sweetener can be used if your favorite one isn’t available, just be sure to adjust the amount based on its sweetness level.