Craving a dessert that’s both refreshingly tangy and delightfully light, yet perfectly aligns with your low-carb lifestyle? Look no further! This heavenly Keto Fluffy Lemon Burst Mousse is an absolute game-changer. Crafted with just four simple ingredients, it comes together in minutes, offering a burst of sunshine that’s ideal for any time of year, especially bright spring days and warm summer evenings. Prepare to be enchanted by its creamy texture and vibrant lemon flavor – a truly guilt-free indulgence.
Indulge Guilt-Free: The Ultimate Keto Fluffy Lemon Mousse – A Zesty, Low-Carb Delight!
If you’re a connoisseur of all things lemon, explore these other delightful recipes: 4 Ingredient No Bake Lemon Pie, Easy No-Bake Lemon Lasagna Dessert, and these charming Mini Lemon Bundt Cakes. They are all sure to satisfy your lemon cravings!

Why This Keto Lemon Mousse Will Be Your New Favorite Dessert
Our Keto Fluffy Lemon Burst Mousse is more than just a recipe; it’s a testament to how incredible a dessert can be while keeping things simple and keto-friendly. The magic lies in its core ingredients: luscious cream cheese, rich whipping cream, a touch of keto-approved powdered sweetener, and the bright, invigorating zest of real lemon juice. These four components harmoniously blend to create a light, airy, and incredibly creamy dessert that bursts with an authentic, fresh lemon flavor.
What truly sets this lemon mousse apart is its exquisite balance. We recommend adding a tiny pinch of salt – a secret weapon that elevates all the flavors, making the sweet notes sweeter, the tartness more pronounced, and the overall “zing” unforgettable. This technique is similar to how we achieve perfection in our Fluffy Raspberry Mousse (Keto Option). We are passionate about easy mousse recipes, and this lemon version is a shining example.
This dessert is the epitome of convenience and flavor. It’s an ultimate spring and summer dessert that you can literally whip up in mere minutes. Whether you serve it immediately, within the hour, or chill it in the fridge until your guests arrive, its delightful texture and taste remain consistently perfect. It’s the ideal treat for spontaneous gatherings or a quick, elegant finish to any meal, all while adhering to your low-carb goals.

Crafting Perfection: Essential Tools, Servings & Presentation Tips
To achieve the signature airy and fluffy texture of this keto lemon mousse, a good mixer is essential. Whether you use a stand mixer with a whisk attachment or a high-quality electric hand mixer, it will make the process incredibly easy and ensure perfectly whipped results. This recipe yields four individual servings, making it perfect for a small family or a cozy dessert for two with leftovers. If you’re hosting a larger crowd, simply double or triple the recipe with ease. The beauty of this dessert is how scalable it is.
Beyond individual servings, this versatile lemon mousse can be transformed into various stunning desserts. We discuss other options for lemon mousse filling further down, perfect for pies or elegant layered creations. Remember to adjust the quantities of ingredients accordingly when scaling the recipe to suit your needs.
Presentation is key to making any dessert truly special, and this fluffy lemon mousse offers endless possibilities. For a simple yet elegant touch, garnish your mousse with fresh berries like raspberries or blueberries, or a delicate slice of lemon. To truly impress, transfer the prepared mousse into a pastry bag fitted with a large star tip. Pipe the mousse into elegant ramekins, charming glass cups, or even mini martini glasses for a sophisticated presentation. This not only makes the dessert visually appealing but also adds to the luxurious experience of enjoying each zesty, creamy bite.

Sweetening Success: Understanding Keto-Friendly Sugar Substitutes
Achieving the perfect sweetness without the carbs is crucial for any keto dessert. For this Keto Fluffy Lemon Burst Mousse, we specifically recommend a high-quality powdered sugar substitute. The one we used and love is Lakanto powdered sugar. Lakanto, a brand that consistently delivers excellent results, offers a monk fruit and erythritol blend that behaves remarkably like traditional powdered sugar, making it an ideal choice for frostings, cheesecakes, and, of course, mousses.
We frequently rave about Lakanto’s extensive range of products because they provide healthy, sugar-free alternatives for all your baking needs, including white, brown, and powdered sugars. Their powdered variety dissolves beautifully, ensuring no grainy texture in your delicate mousse. It delivers that perfect sweetness without any of the undesirable aftertastes sometimes associated with other sweeteners.
However, if you’re not strictly adhering to a sugar-free or keto diet and simply want to enjoy a delicious lemon mousse, feel free to use regular powdered sugar. The recipe will taste equally amazing, offering a delightful treat regardless of your dietary preference. The core flavors of lemon and cream will shine through, making it a fantastic dessert either way. We promise you won’t be disappointed!

Simple Ingredients, Explosive Flavor: What You’ll Need
The beauty of this Keto Fluffy Lemon Mousse lies in its simplicity, requiring minimal ingredients for maximum flavor impact. Here’s what you’ll need to create this delightful low-carb dessert:
- Heavy Cream: This is the foundation of our mousse, providing the rich, creamy base and essential fluffiness when whipped. Ensure it’s very cold for optimal whipping results.
- Cream Cheese: Use full-fat cream cheese, and it’s crucial that it’s softened to room temperature. This allows it to whip smoothly without lumps, creating a silky texture.
- Powdered Sweetener: For a true keto option, opt for a sugar-free powdered sugar like Lakanto. If keto isn’t a concern, regular powdered sugar works perfectly. The powdered form ensures a smooth, non-gritty finish.
- Fresh Lemon Juice: The star of the show! We recommend the juice of 2 fresh lemons for a vibrant, authentic lemon burst. Taste and adjust as needed – you want that zing without it being overpowering. We haven’t tested this recipe with lemon extract, as fresh juice provides a far superior, natural flavor.
- Pinch of Salt: Don’t skip this! A tiny bit of salt enhances all the other flavors, making the lemon brighter and the cream richer.
Optional additions to elevate your mousse:
- Vanilla Extract: A splash can add a subtle warmth and depth.
- Lemon Zest: For an even more intense lemon aroma and flavor, a teaspoon of finely grated lemon zest is a fantastic addition.
- Fresh Berries: Raspberries, blueberries, or sliced strawberries make for beautiful garnishes and add a complementary fruity note.
Whip It Up: Step-by-Step Instructions for Keto Lemon Mousse
Creating this light and airy Keto Fluffy Lemon Mousse is incredibly straightforward. Follow these simple steps for a perfect dessert every time:
- Prepare the Base: In a large mixing bowl, using either a stand mixer fitted with a whisk attachment or an electric hand mixer, begin by whipping your softened cream cheese until it is completely smooth and free of any lumps. This initial step is vital for a silky mousse.
- Whip to Fluffy Perfection: Next, add the cold heavy whipping cream and your chosen powdered sweetener (Lakanto for keto, or regular powdered sugar) to the bowl with the cream cheese. Start whipping on medium-high speed. Continue to whip the mixture until it becomes fluffy and creamy, and soft peaks begin to form.
- Introduce the Lemon Burst: Once soft peaks have formed, gently add the fresh lemon juice and the pinch of salt. Continue whipping the lemon mixture on medium speed until it achieves a beautifully fluffy mousse texture with stiff peaks. Be careful not to over-whip, as this can cause the mousse to become grainy or separate. Whipping at a moderate speed helps maintain that ideal smooth, airy consistency.
- Serve and Enjoy: Once your mousse is perfectly whipped, it’s ready to be served! Spoon the delightful mixture into a large serving bowl, or portion it out into individual ramekins or glass dishes for an elegant presentation. Garnish with a fresh lemon slice, a sprinkle of lemon zest, or your favorite fresh berries for a pop of color and extra flavor.
Storing Your Zesty Masterpiece
One of the best things about this Keto Fluffy Lemon Mousse is how well it stores, making it an excellent make-ahead dessert. Once prepared and portioned (or kept in a single container), cover it tightly with plastic wrap or an airtight lid. This will prevent it from absorbing any odors from the fridge and maintain its freshness and light texture. Store the lemon mousse in the refrigerator for up to 5 days. It will remain delicious and perfectly chilled, ready for whenever you desire a refreshing, low-carb treat.

Beyond the Bowl: Versatile Uses for Lemon Mousse
While this Keto Fluffy Lemon Burst Mousse is absolutely divine served on its own, its creamy and stable texture makes it incredibly versatile for other dessert applications. Think beyond the simple cup and imagine it as a luxurious component in more elaborate creations:
- Pie or Tart Filling: This mousse makes an exceptional sugar-free and low-carb filling for a lemon pie or tart. For a standard 8×8 or 9×9 inch pan, the single recipe works perfectly. If you’re aiming for a larger 9×13 inch layered dessert, we recommend doubling the recipe to ensure generous layers. Pair it with a keto-friendly almond flour crust for an exquisite low-carb lemon pie.
- Layered Cheesecake Dessert: Create a show-stopping layered dessert by alternating the lemon mousse with other keto-friendly components. Imagine a base of crushed sugar-free cookies or a gluten-free graham cracker substitute, followed by a layer of our fluffy lemon mousse. You could then add fresh berries (raspberries or blueberries complement lemon beautifully), a swirl of homemade sugar-free lemon curd, and a final topping of whipped cream or more mousse. This creates a multi-textured and flavor-rich dessert that everyone will adore.
- Cupcake or Cake Filling: Use it as a zesty, light filling for keto cupcakes or between layers of a low-carb sponge cake. It adds a delightful moisture and tang that perfectly balances richer cake bases.
The possibilities are truly endless once you master this simple mousse recipe. Let your culinary creativity soar!
Explore More Keto & Low-Carb Desserts You’ll Adore
If you’ve fallen in love with the light and creamy texture of this lemon mousse and are keen to explore more delightful keto-friendly treats, we have plenty of other mousse and cheesecake pudding recipes that are sure to tantalize your taste buds:
- Fluffy Raspberry Mousse – 3 Ingredients of Heaven!
- Keto Fluffy Chocolate Mousse – 3 Ingredients of Heaven!
- OMG Chocolate Cheesecake Stuffed Strawberries – Keto Option Too
- Cookies and Cream Mousse – 3 Ingredients
- 3 No Bake Mousses You’ll Love
- Ultimate Triple Layer Chocolate Brownie Mousse Cream Pie (can be adapted for keto)

Frequently Asked Questions About Keto Lemon Mousse
Can I use bottled lemon juice instead of fresh?
While fresh lemon juice provides the brightest, most authentic “burst” of flavor, you can use bottled lemon juice in a pinch. However, be aware that the flavor might be slightly less vibrant. Always taste and adjust for your preference.
My mousse isn’t firm enough. What went wrong?
Several factors can affect firmness:
- Cream Cheese Temperature: Ensure your cream cheese is softened but not warm. If it’s too cold, it won’t whip smoothly; if too warm, it might not hold air.
- Whipping Cream Temperature: Your heavy cream must be very cold for it to whip properly into stiff peaks.
- Over-whipping: Paradoxically, over-whipping can sometimes cause the mixture to break down. Stop whipping as soon as stiff peaks form.
- Lemon Juice Quantity: Adding too much liquid (lemon juice) can hinder the mousse from firming up. Stick to the recommended amount and taste before adding more.
If your mousse is still a little soft, chilling it for an extended period (2-4 hours) will often help it firm up further.
Can I make this dairy-free?
This recipe relies heavily on dairy (heavy cream and cream cheese) for its texture and flavor. While there are some dairy-free heavy cream and cream cheese alternatives available, we haven’t tested this specific recipe with them. Results may vary significantly in terms of texture and stability.
Is this mousse suitable for freezing?
While you can freeze mousse, the texture often changes upon thawing, becoming slightly icier or less airy. We recommend enjoying this mousse fresh or chilled from the refrigerator within 5 days for the best experience.
The Perfect Seasonal Treat: Why Lemon Shines in Spring & Summer
Lemon, with its bright and invigorating profile, is a flavor that truly comes alive during the warmer months of spring and summer. It’s no coincidence that citrus-infused desserts are so popular when the sun is shining and a refreshing treat is most desired. The natural tartness and vibrant aroma of lemon cuts through richness, offering a palate-cleansing experience that feels light and revitalizing.
This Keto Fluffy Lemon Burst Mousse embodies everything wonderful about a seasonal dessert. It’s cool, creamy, and delivers that signature zesty punch without being heavy or overly sweet. It provides a much-needed reprieve from the heat, offering a refreshing escape with every spoonful. Furthermore, the no-bake aspect of this recipe means you don’t have to turn on your oven, keeping your kitchen cool – an absolute blessing during those hot summer days. Make it for your next spring brunch, summer barbecue, or simply as an everyday treat to brighten your mood!
Conclusion: Your Go-To Keto Lemon Dessert Awaits!
In conclusion, this Keto Fluffy Lemon Burst Mousse is not just a delicious treat for those following a keto or low-carb diet, but it also offers a uniquely tangy and delightfully light alternative to traditional mousse recipes. With minimal ingredients and incredibly simple steps, anyone can effortlessly create this satisfying dessert. It’s a truly guilt-free indulgence that beautifully showcases the vibrancy of fresh lemon while perfectly integrating into a keto lifestyle.
Prepare to fall in love with this easy lemon mousse recipe, bursting with the irresistible flavor of fresh lemon juice. Its fluffy texture and zesty appeal make it a universally loved dessert that will have everyone asking for more. So, don’t wait any longer – whip it up now and experience the joy of this amazing low-carb creation! We encourage you to share your delicious creations on Pinterest, Instagram, and Facebook!
More Zesty Lemon Burst Ideas!
- Lemon Burst Poke Cake
- 4 Ingredient No Bake Lemon Pie
- White Chocolate Chip Lemon Cookies
- Soft Lemon & Blueberry Explosion Cookies
- Luscious Lemon Chiffon Pie
- Best Lemon Cheesecake
- Super Soft Lemon Glazed Sugar Cookies
- Lemon Raspberry Crumb Cake
- Soft Lemon & Blueberry Explosion Cookies!!

Recipe: Fluffy Lemon Burst Mousse – Keto
By Kim Lange
This recipe delivers 4 ingredients of heavenly sunshine to create a light, fluffy, and creamy delight, bursting with fresh lemon flavor! Our Keto Fluffy Lemon Burst Mousse consists of cream cheese, whipping cream, keto-friendly powdered sugar, and real lemon juice. Don’t forget a pinch of salt to truly bring out the sweet, tart, and zingy notes of all the flavors!
Recipe Details:
- Prep Time: 5 minutes
- Course: Dessert
- Servings: 4 Servings
- Calories: 468 kcal per serving
Ingredients:
- 1 ⅓ cup heavy whipping cream
- 8 oz cream cheese, softened
- ¾ cup powdered sugar or sugar-free powdered sugar (like Lakanto for Keto)
- Juice of 2 fresh lemons (Do not add more lemon juice unless needed. Taste then determine. Fresh lemon flavor is preferred over extract.)
- Pinch of salt
Instructions:
- Start by whipping the softened cream cheese in a large bowl using a stand mixer or electric mixer until it is completely smooth.
- Add the cold heavy whipping cream and powdered sugar (or sugar-free powdered sugar). Whip on medium-high speed until the mixture becomes fluffy, creamy, and soft peaks begin to form.
- Carefully add the lemon juice and the pinch of salt. Continue whipping the lemon mixture on medium speed until it reaches a fluffy mousse texture and stiff peaks form. Avoid whipping at high speed to ensure the best texture without over-whipping.
- Spoon the finished mousse mixture into a serving bowl or individual dishes. Garnish with fresh lemon slices, berries, or an extra swirl of whipped cream if desired!
Notes:
If you plan to use this lemon mousse as a filling for a pie or a layered dessert, use an 8×8 or 9×9 inch pan. For a larger 9×13 inch layered dessert, simply double the recipe.
Nutrition Information:
- Calories: 468 kcal
- Carbohydrates: 5g
- Protein: 5g
- Fat: 49g
- Saturated Fat: 29g
- Cholesterol: 171mg
- Sodium: 212mg
- Potassium: 138mg
- Sugar: 2g
- Vitamin A: 1928IU
- Vitamin C: 1mg
- Calcium: 107mg
- Iron: 1mg
Keywords:
fluffy dessert, keto, keto mousse, lemon, lemon mousse, pudding, spring desserts, summer desserts, whipped cream
