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key lime mousse in glass dessert dishes with whipped cream and lime

Key Lime Mousse

Course: Dessert
Cuisine: American
Prep Time: 10 minutes
Chill Time: 1 hour
Total Time: 10 minutes
Servings: 8 people
Calories: 309
This mousse is a modified chocolate mousse recipe. Instead of using cocoa, key lime was substituted in. Serve with whipped cream if desired.
Print Recipe


  • 1 envelope grass-fed gelatin about 7 grams or 2 ½ teaspoons
  • ¼ cup cold water
  • cup boiling water
  • ½ cup low carb sugar substitute or more to taste (see note)
  • 1 tablespoon lime zest
  • 2 cups cold whipping cream
  • cup key lime juice


  • Sprinkle gelatin over cold water in small bowl; let stand 2 minutes to soften. Add boiling water; stir until gelatin is completely dissolved and mixture is clear. Cool slightly.
  • Combine sweetener and lime zest in large bowl. Add whipping cream and beat with an electric mixer until stiff peaks form.
  • Pour in gelatin mixture and key lime juice. Beat again until well blended.
  • Refrigerate at least two hours or until mousse is set. Store covered in refrigerator.


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If you're using a erythritol based sweetener, it can crystallize in the mousse if you add too much. It's not recommended to use more than a half cup of erythritol. For a sweeter mousse, a stevia or monk fruit extract is preferred.


Calories: 309 | Carbohydrates: 2g | Protein: 25g | Fat: 24g | Saturated Fat: 14g | Cholesterol: 80mg | Sodium: 36mg | Vitamin A: 800IU

Additional Info

Net Carbs: 2 g | % Carbs: 2.5 % | % Protein: 30.9 % | % Fat: 66.7 % | SmartPoints: 11
    [calories] => 309
    [carbohydrates] => 2
    [protein] => 25
    [fat] => 24
    [saturated_fat] => 14
    [cholesterol] => 80
    [sodium] => 36
    [vitamin_a] => 800

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