This Keto Peanut Butter Mousse is the ultimate low-carb indulgence. It’s incredibly creamy, rich, and tastes like a decadent dessert you’d get at a fancy restaurant—but it requires only 5 minutes of prep and a handful of simple ingredients.
With healthy fats and minimal carbs, this mousse will satisfy your sweet tooth while keeping you firmly in ketosis.
The Grocery List (Ingredients)
*Makes 2-4 servings (depending on portion size)*
For the Mousse:
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4 oz Cream Cheese, softened
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½ cup Heavy Whipping Cream
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⅓ cup Natural Peanut Butter (creamy, no sugar added—just peanuts and salt)
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¼ cup Powdered Sweetener (such as powdered erythritol, allulose, or monk fruit blend—powdered is key for a smooth texture)
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1 teaspoon Vanilla Extract
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Pinch of Salt (if your peanut butter is unsalted)
For Garnish (Optional):
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Sugar-free chocolate chips or cacao nibs
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Chopped peanuts
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A dusting of cocoa powder or cinnamon
The Step-by-Step Method
Step 1: Soften the Cream Cheese
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This step is crucial for a silky-smooth mousse. Leave the cream cheese on the counter for 30-60 minutes, or microwave it for 10-15 seconds until soft but not melted.
Step 2: Whip the Cream
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In a medium bowl, pour the heavy whipping cream.
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Use a hand mixer or stand mixer to whip the cream until stiff peaks form. This means when you lift the beaters, the cream stands up in peaks without flopping over.
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Set the whipped cream aside.
Step 3: Make the Peanut Butter Base
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In a separate large bowl, combine the softened cream cheese, peanut butter, powdered sweetener, vanilla extract, and salt.
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Beat with the mixer until the mixture is completely smooth, fluffy, and well combined. Scrape down the sides of the bowl as needed.
Step 4: Fold It All Together
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Add about one-third of the whipped cream to the peanut butter mixture. Gently fold it in with a spatula to lighten the mixture.
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Add the remaining whipped cream and continue folding gently until no white streaks remain. Be careful not to deflate the air you whipped into the cream—this is what makes the mousse light and airy.
Step 5: Chill and Serve
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Spoon the mousse into serving dishes or ramekins.
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Refrigerate for at least 30 minutes to allow it to set. This also enhances the flavor.
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Before serving, garnish with sugar-free chocolate chips, chopped peanuts, or a dusting of cocoa powder if desired.
Storage
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Store leftovers covered in the refrigerator for up to 4 days.
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The mousse will firm up even more as it chills. If it becomes too thick, let it sit at room temperature for 10 minutes before eating.
Pro-Tips for Success
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Powdered Sweetener is Essential: Granular sweeteners (like granular erythritol) will leave your mousse gritty and crunchy. Powdered sweetener dissolves completely for that silky-smooth texture. You can make your own by blitzing granular sweetener in a clean coffee grinder or blender.
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Natural Peanut Butter: Make sure your peanut butter is the kind that just contains peanuts and salt. Avoid brands with added sugar and hydrogenated oils, as they can affect both the flavor and the texture.
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Room Temperature Ingredients: Having the cream cheese at room temperature ensures you won’t have lumps in your mousse.
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Make it a Pie: Press a simple keto crust (almond flour, melted butter, and sweetener) into a pan, let it set, and then fill with this mousse for a no-bake peanut butter pie.
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Flavor Variations: Add a tablespoon of unsweetened cocoa powder to the peanut butter base for a chocolate peanut butter mousse, or a teaspoon of cinnamon for a warm spice note.