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This keto peanut butter mousse one of my favorite fast and fluffy sugar-free desserts! I based it on my cloud-like keto chocolate mousse recipe, but this time with a peanut butter flavor. And it comes together as easily as keto chocolate pudding or strawberry cheesecake fluff. Since it takes just minutes to prep, it’s the perfect keto dessert to make when you need a sweet treat fast.
Most peanut butter mousse recipes are high in carbs and sugar, but this keto mousse uses Besti Powdered Monk Fruit Allulose Blend as a natural sugar replacement. Besti has a fine texture that mixes and sprinkles exactly like powdered sugar (the ONLY allulose-based sweetener with a real powdered sugar texture) — but with zero calories, zero grams of net carbs, and zero glycemic index!
Why You’ll Love This Keto Peanut Butter Mousse Recipe
- Rich peanut butter flavor
- Light, fluffy, & creamy
- 5 simple ingredients
- 5 minutes prep time
- 3.8g net carbs, with no sugar or sugar alcohols
- No baking & naturally gluten-free
Ingredients & Substitutions
This section explains how to choose the best ingredients for this keto peanut butter mousse recipe, what each one does in the recipe, and substitution options. For measurements, see the recipe card below.
- Heavy Cream – Whipping the cream makes the mousse light and fluffy! You can substitute coconut cream, but the recipe would still have dairy, because it has mascarpone in it.
- Peanut Butter – Gives this mousse a nutty flavor. You could use other nut butters such as almond butter, as long as they contain no added sugar.
- Besti Powdered Monk Fruit Allulose Blend – If you need to use a different keto sugar substitute, I recommend powdered allulose. Granulated sweeteners, or even powdered sweeteners that contain erythritol (which is most brands of monk fruit and stevia), can lead to a gritty texture.
- Mascarpone Cheese – Makes the mousse so rich and creamy. If you can’t find store-bought, you can make homemade mascarpone cheese or use cream cheese instead. Warm to room temperature so that it blends in smoothly.
- Sugar Free Chocolate Sauce – Optional, for a sweet topping. You could also used chopped peanuts and sugar-free chocolate shavings, as shown in the photos.
How To Make Keto Peanut Butter Mousse
This section shows how to make low carb peanut butter mousse, with step-by-step photos and details about the technique, to help you visualize it. For full instructions, including amounts and temperatures, see the recipe card below.
- Beat the cream. In a large bowl, use a hand mixer to beat the heavy cream until soft peaks form, about 3-4 minutes. Remove 1/4 of the whipped cream and set aside to use later.
TIP: Don’t overmix.
You want soft peaks, not stiff peaks. Soft peaks will form trails, but are not super stiff. If you hold your mixer up, the peaks should curve over.
- Mix other ingredients. In a small mixing bowl, stir together peanut butter and mascarpone cheese, until creamy. Stir in powdered Besti, until well blended.
- Fold in cream. Add the peanut butter mixture to the whipped cream, and gently fold it in.
TIP: Fold, don’t stir!
To keep your mousse fluffy, use a folding motion. This ensures that you don’t break down the whipped cream.
- Assemble. Scoop the peanut butter mousse into serving dishes and top with chocolate sauce (optional) and a dollop of extra whipped cream.
Add different ingredients to this keto peanut butter mousse recipe to make it even better! Here are a few ideas:
- Keto Chocolate Peanut Butter Mousse – Melt sugar-free chocolate chips in the microwave in 30 second intervals and add to your peanut butter and cheese mixture. Works with milk chocolate chips and white chocolate chips, too! Alternatively, add 1-2 tablespoons of cocoa powder to the peanut butter mixture at the same time as powderd Besti.
- Add fruit – Swirl in cooked and pureed fruit of your choice after folding in whipped cream. Keto fruits such as raspberries or strawberries work well with the peanut butter flavor. Alternatively, add fruit on top as a garnish.
- Use extracts – Add hazelnut, mint, or vanilla extract to the cream after whipping.
- Make a nut-free version – Use sunflower seed butter instead of peanut butter.
- Store: Cover peanut butter mousse and store in the refrigerator for 3-5 days.
- Meal prep: Make keto peanut butter mousse ahead, divide into serving dishes or glass jars, and store in the refrigerator. Wait until right before serving to add any whipped cream topping, if using.
- Freeze: Store in an airtight container, leaving a little room for it to expand, and freeze for 1-2 months. Thaw overnight in the refrigerator.
More Keto Peanut Butter Desserts
If you like peanut butter on keto, you’ll love these easy keto desserts too:
Tools To Make Low Carb Peanut Butter Mousse
- Hand Mixer – Save time whipping mousse with this 5-speed hand mixer.
- Serving Dishes – A dessert this good deserves fancy dishes!
Keto Peanut Butter Mousse Recipe
Keto Peanut Butter Mousse (10 Minutes!)
5-minute keto peanut butter mousse is sweet and fluffy, with simple ingredients like mascarpone, cream, and sweetener. Just 3.8g net carbs!
Tap underlined ingredients to see where to get them. Please turn Safari reader mode OFF to view ingredients.
Tap on the times in the instructions below to start a kitchen timer while you cook.
In a large bowl, use a hand mixer to beat the heavy cream until soft peaks form, about 3-4 minutes. Remove 1/4 of the whipped cream and set aside to use later.
In a small bowl, stir together peanut butter and mascarpone cheese, until creamy. Stir in powdered Besti, until well blended.
Add the peanut butter mixture to the whipped cream, and gently fold, being careful not to break down the whipped cream too much.
Scoop the peanut butter mousse into serving dishes and top with chocolate sauce (optional) and a dollop of the reserved whipped cream.
Last Step: Leave A Rating!
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Serving size: 1/2 cup peanut butter mousse with 1 tablespoon whipped cream on top
Nutrition facts do not include chocolate sauce.
Nutrition facts are provided as a courtesy. Have questions about calculations or why you got a different result? Please see our nutrition policy.
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Delicious dessert! Also made the chocolate syrup … so good!
I added this to my Kitchen Experiments and nearly screamed in delight when I tasted it. How in the world do you come up with these? It’s so delicious I’m going to try to find the sweet spot between cold and frozen so I can have it as “near ice cream.” Thanks so much for all the work you and the team does to make me love my kitchen!
Just what I needed today. Nice, tasty keto-friendly dessert! Thank you for sharing, great recipe!
So yummy and healthy! Thanks for sharing this recipe!
Journa Liz Ramirez0
This peanut butter mousse turned out to be so beautiful and yummy. My kids love it! It is so fluffy and easy to make. I’ll surely have this again, thanks Maya!
Can you freeze this
Maya | Wholesome Yum0
Hi Sheryl, Yes, you should be able to freeze it.
Can I use cream cheese instead of the mascarpone cheese
Maya | Wholesome Yum0
Hi Lana, Yes, you can!
I’ve made this recipe three times in two weeks. My husband loves this dessert and often explains while eating “this is like restaurant quality good.” I love this mouse but also like a bit of texture. I like to sprinkle on some of my homemade keto chocolate chip cookies for a crunch and it’s so perfect! Thanks for this awesome recipe!
Made this last night…quick and simple.
Fed it to my keto skeptic spouse—- blew her away!
Guess who’s going keto now!
PS: I made keto chocolate sauce and put a tablespoon of sauce on each—- a very grown up Reese’s Cup ! Yum!