This no-bake keto key lime pie mousse is the perfect light and refreshing dessert—ultra creamy, smooth, and bursting with tangy lime flavor. Made with just 6 simple low-carb ingredients, it comes together in only 5 minutes and delivers all the deliciousness of key lime pie without the need for baking or crust.
Whether you’re craving a quick weeknight treat or need a make-ahead dessert for guests, this keto lime mousse is a total crowd-pleaser. It’s low-carb, sugar-free, and rich enough to feel like a true indulgence—without kicking you out of ketosis.
I’m a huge fan of easy keto desserts that everyone loves—and some of my all-time favorites include keto chocolate mousse, fudgy low-carb brownies, no-bake keto cheesecake, and now, this bright and tangy keto lime mousse.
The best part? There’s no crust to bake, no oven required, and no long wait times. You don’t need to spend hours prepping a graham cracker base or chilling a baked filling. This sugar-free summer dessert comes together in under 10 minutes, making it the perfect quick and refreshing treat to enjoy anytime.
Reasons You’ll Love This Keto Lime Mousse Recipe
This keto lime mousse is the kind of dessert that checks every box—creamy, refreshing, and so easy to make. Here’s why this sugar-free treat will become a go-to favorite:
- Ultra Creamy, Thick, and Fluffy – The perfect mousse texture—light and airy with a velvety richness that melts in your mouth.
- Quick and Easy – Ready in just 5 minutes with no baking required. It’s the ultimate low-effort, high-reward dessert.
- Bright and Refreshing – Bursting with tangy lime flavor, it’s perfect for summer, spring, or anytime you want a zesty pick-me-up.
- Elegant but Effortless – A beautiful, crowd-pleasing dessert that’s ideal for dinner parties, BBQs, summer picnics, or special occasions.
- No Condensed Milk, No Baking – Unlike traditional mousse or pie recipes, this one keeps things light, low-carb, and fuss-free.
- Low-Carb and Keto-Friendly – Each serving has just 5g net carbs, making it a great option for anyone following a keto or low-carb lifestyle.
- Simple Ingredients – Made with only 6 easy-to-find ingredients, most of which you probably already have in your fridge or pantry.
- Perfect Make-Ahead Dessert – Store it in the fridge and serve chilled—great for prepping ahead of time for effortless entertaining.
Ingredients for Keto Key Lime Pie Mousse
You’ll only need six simple ingredients to make this ultra-creamy, sugar-free lime mousse with the perfect balance of sweetness and zesty freshness. Here’s what you’ll need:
- Cream cheese – Use full-fat cream cheese, softened to room temperature for easy blending. This gives the mousse its rich, velvety texture and helps it whip up light and smooth.
- Heavy cream – Choose unsweetened heavy whipping cream to add volume and create that signature fluffy mousse consistency.
- Sweetener – Go with a keto-friendly powdered sweetener for best results—it dissolves easily and won’t leave a gritty texture. Great options include monk fruit sweetener, erythritol, or a blend of both.
- Lime – Use both the fresh lime juice and zest for the brightest, most fragrant citrus flavor. Key limes work beautifully, but regular limes are a great alternative.
- Gelatin powder – Just a little bit of unflavored gelatin helps the mousse set perfectly while keeping the texture light and creamy. You can also use a vegetarian gelatin substitute like agar-agar if preferred.
- Vanilla extract – Adds subtle warmth and rounds out the tartness. For extra citrus punch, consider adding a drop or two of lime extract as well.
How to Make No-Bake Keto Key Lime Cheesecake Mousse
This tangy, creamy, low-carb dessert comes together in just 5 minutes of prep time and tastes like a slice of key lime pie—without the crust or carbs! It’s the perfect make-ahead dessert for summer gatherings, dinner parties, or anytime you’re craving something light and refreshing.
- Dissolve the gelatin in the lime juice and mix well.
- In a large bowl, cream together cream cheese, heavy cream, sweetener, lime zest, and vanilla extract. Use room temperature ingredients to ensure good mixing and avoid any lumps.
- Stir in the lime and gelatin mixture.
- Divide between serving glasses and refrigerate for at least 2 hours, preferably overnight.
- Top with more lemon zest, and enjoy it straight out of the fridge.
Tips and Variations for the Best Keto Lime Mousse
- Use Room Temperature Ingredients – Soften the cream cheese and let the heavy cream sit out for a few minutes before mixing. This ensures a smoother, lump-free texture and makes whipping quicker and easier.
- Chill Before Serving – For the best flavor and structure, refrigerate the mousse for at least 2 hours, or overnight. It sets beautifully and the citrus flavor intensifies as it chills.
- Make It Ahead – This dessert is perfect for meal prep or entertaining. Prepare it a day in advance and store it in an airtight container in the refrigerator. It stays fresh for up to 2 days.
- Portion It Beautifully – Serve in small mason jars, parfait glasses, or mini dessert cups for a polished, party-ready presentation.
- Make It Tropical – Add a splash of coconut extract or top with unsweetened toasted coconut for a tropical flavor profile.
- Add Texture – Sprinkle crushed keto graham crackers, coconut flakes, or chopped nuts (like pecans or macadamia) on top for crunch.
- Mini Key Lime Pie Jars – Layer the mousse over a spoonful of crushed keto cookie crust (like almond flour and butter) to create mini crustless key lime pies in jars.
How To Serve Keto Lime Mousse
You can serve this easy low carb key lime pie mouse just as it is or make a delicious parfait using a keto graham crackers layer.
It’s a delicious frosting for keto lemon pound cake or vanilla protein muffins.
Some crushed pistachios add a fantastic crunch.
More Keto Desserts
Keto Key Lime Pie Mousse
Description
Ingredients
- 16 oz cream cheese room temperature
- 1 cup heavy cream
- ¾ cup sweetener powdered, or more to taste
- 4 limes juiced or about 5 tablespoons of lime juice
- 2 tbsp lime zest
- 2 tsp gelatin powder unflavored
- 2 tsp vanilla extract
Instructions
- In a small bowl, combine the lime juice and gelatin powder and microwave for 30 seconds until warm. Stir until the gelatin is completely dissolved.
- Add room temperature cream cheese, heavy cream, powdered sweetener, lime zest, and vanilla extract to a large bowl. Using a hand mixer, beat all the ingredients until the filling is smooth and creamy.
- Pour the prepared gelatin mixture and mix until well incorporated.
- Divide evenly between 8 serving glasses and refrigerate for at least 2 hours.
How do we calculate the nutrition info?
These nutrition facts listed are determined using nutrition information from the USDA Food Database. Our nutrition facts are accurate, but if you are using different products, please make your calculations. Net carb count is calculated by subtracting both fiber and sugar alcohols because they don’t raise blood sugar.