If you’re a fan of rich and creamy desserts with a refreshing citrus twist, this Keto Lemon Cheesecake Mousse is sure to become one of your go-to recipes. It’s bursting with fresh lemon flavor and comes together in just minutes—perfect for those following a keto lifestyle or simply looking for a low-carb sweet treat that doesn’t compromise on taste.

This lemony mousse is not only satisfying but also a smart way to boost your healthy fats for the day, with an impressive 33 grams of fat per serving. If you enjoy mousse-style desserts, you’ll also want to check out these other keto-friendly favorites: Salted Caramel Cheesecake Mousse, Silky Chocolate Avocado Mousse, Easy Pumpkin Cheesecake Mousse, Nutella Chocolate Mousse, and Strawberry Coconut Cream Mousse.

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A Quick & Easy No-Bake Keto Dessert

What makes this recipe a standout? Simplicity. This mousse takes less than 10 minutes to prepare from start to finish. Whether you’re entertaining or just want something quick after dinner, this is a perfect last-minute keto dessert. You can easily tailor the intensity of the lemon flavor by adjusting the amount of lemon curd used, depending on your personal preference. What makes this recipe a standout? Simplicity. This mousse takes less than 10 minutes to prepare from start to finish. Whether you’re entertaining or just want something quick after dinner, this is a perfect last-minute keto dessert. You can easily tailor the intensity of the lemon flavor by adjusting the amount of lemon curd used, depending on your personal preference.

Ingredients in Keto Lemon Cheesecake Mousse

Here’s everything you need to whip up this bright and creamy mousse:

Cream cheese

Heavy cream

5-Minute Lemon Curd

Swerve Confectioners sweetener

(You’ll find exact measurements in the recipe card.)

How to Make Low-Carb Lemon Cheesecake Mousse

Begin by whipping the heavy cream in a mixing bowl until soft peaks form Be careful not to over-whip—it should be light and fluffy, not stiff or buttery.

In a separate bowl, use a hand mixer to beat the cream cheese until it’s smooth and creamy.

Add the lemon curd and Swerve Confectioners sweetener, mixing until fully combined. Continue beating until well incorporated.

Combine and chill: Gently fold in the whipped cream until the mixture is uniform. Chill in the refrigerator (or even the freezer) for around 10 minutes to let it set before serving.

If you’re a lover of all things lemon, you might also want to try a Keto Lemon Soufflé—another elegant, zesty dessert!

How Many Carbs Are in Lemons?

You might be wondering if lemons are keto-friendly. The good news is—yes, they are! The lemon curd used in this mousse recipe contains ½ cup lemon juice for the full batch. That amount adds up to just 10 net carbs. Because this mousse uses just ⅔ cup of lemon curd, each serving ends up with only about 3 net carbs.

Lemon Nutrition:

More Than Just Flavor
Lemons aren’t just a tasty way to add brightness to your dishes. Lemons are an excellent source of vitamin C and also provide potassium and vitamin B6. Health line notes that including lemon juice or lemon water in your diet may help ease stress, strengthen the immune system, reduce the risk of kidney stones, and provide other health benefits. offer protection against anemia and several diseases.

Getting the Perfect Lemon Flavor

When it comes to lemony desserts, everyone has their own flavor preferences. This recipe uses ⅔ cup of lemon curd, striking the perfect balance between sweet and tangy. However, if you’re someone who prefers a milder lemon flavor, try using ½ cup instead. If you’re a citrus lover and want a stronger punch, go ahead and use ¾ cup.

Tip: Begin with a small amount of lemon curd. After mixing the mousse, taste it and adjust by adding more if desired. This way, you’ll get exactly the flavor you’re looking for without overwhelming your taste buds.

Tips for the Best No-Bake Lemon Cheesecake Mousse

Avoid Overmixing
Be cautious when whipping your cream. Over-mixing it can lead to the formation of butter—yes, really! The goal is to achieve soft peaks for the best mousse texture. Mix It Your Way
Use a hand mixer, stand mixer, or even a whisk if you’re in the mood for a mini arm workout!

Sweetener Swaps

No Swerve Confectioners? No problem—powdered erythritol works just as well. If you only have Swerve Granular, just blitz it in a coffee grinder or spice mill until fine.

Cream Cheese Alternatives

Not into cream cheese or aiming for fewer carbs? Try Mascarpone instead. It’s just as creamy, with a milder taste and even lower carb count. I love using it in everything from mousse and frosting to savory sauces—even gravy!

Creative Ways to Serve Your Keto Mousse
Presentation can take a simple dessert to the next level! Here are a few fun ways to serve this mousse:

In martini glasses for an elegant, upscale feel.

Topped with fresh lemon zest and a slice of lemon for a pop of color.

Mini dessert cups or shot glasses for parties or gatherings—perfect for portion control and presentation!

Piped using a pastry bag, garnished with a fresh berry, mint sprig, or zest curls for added flair.

Can You Use This Recipe as Fat Bombs?

Absolutely! This mousse also doubles as a fat bomb, especially when portioned into smaller servings. You can refrigerate or freeze them in small containers or use a cookie scoop to make little bite-sized balls once they’re set. Freeze for later, and you’ll have an instant keto snack on hand.

When divided this way, you’ll get about 15 or more mini servings, each offering roughly 15 grams of fat and just over 1 net carb—ideal for anyone on a high-fat, low-carb meal plan.