Keto Chocolate Mousse

Keto chocolate mousse is a whipped dessert of cream cheese, heavy cream, cocoa powder, and a keto-friendly sweetener, and this version runs about 4 g net carbs per 1/2-cup serving. It sets up rich and airy in the fridge in about 30 minutes, needs no eggs, gelatin, or double-boiler, and uses ingredients you likely already keep in a keto kitchen.

Traditional chocolate mousse leans on sugar and sometimes flour-thickened custard to get its texture, which is exactly what pushes a normal serving to 25 g or more of carbs. This version gets the same silky, spoonable texture from whipped cream folded into a cream-cheese-and-cocoa base, with erythritol or an allulose blend doing the sweetening instead of sugar. If you're new to swapping ingredients like this, our keto food list is a good primer on which staples make the cut.

Why does this recipe work on keto?

This mousse works on keto because none of its five main ingredients contribute meaningful digestible carbohydrate: cream cheese and heavy cream are both naturally low in carbs, unsweetened cocoa powder is mostly fiber, and the sweetener is a sugar alcohol that doesn't raise blood sugar. The result is a dessert built almost entirely from fat and a little protein — the two macros keto is designed around — rather than the sugar and starch a traditional mousse depends on.

If you swap brands, recalculate the full recipe from the new label values. The net-carb estimate calculator can apply explicit deductions to one product label, but it does not accept an ingredient list or combine a recipe.

Ingredients you'll need

Each note below shows roughly how much that ingredient adds to the 4 g net carbs per serving total.

• 6 oz (170 g) full-fat cream cheese, softened — about 1 g net carbs per serving; use full-fat, not reduced-fat, for a stable set.
• 1 1/2 cups (350 ml) cold heavy whipping cream — about 1.5 g net carbs per serving, from naturally occurring milk sugar; keep it cold so it whips properly.
• 1/2 cup (42 g) unsweetened cocoa powder, sifted — about 1.5 g net carbs per serving; cocoa is roughly a third fiber by weight, which offsets most of its carbs.
• 1/2 cup (96 g) powdered erythritol or an allulose-erythritol blend, to taste — 0 g net carbs; a powdered form dissolves more smoothly than granular.
• 1 teaspoon vanilla extract — negligible carbs.
• 1 pinch fine sea salt — 0 g carbs; rounds out the chocolate flavor.

No wheat flour, no added sugar, and no eggs — which also means no risk of undercooked egg, since nothing here is cooked.

How to make keto chocolate mousse

1. Soften the cream cheese. Beat it alone for about a minute in a mixing bowl until completely smooth, with no lumps left to fold into the finished mousse.
2. Build the chocolate base. Sift in the cocoa powder and sweetener, add the vanilla and salt, and beat until glossy and uniform. Taste and add a touch more sweetener here if you prefer it sweeter — it's easier to adjust before the cream goes in.
3. Whip the cream. In a separate chilled bowl, whip the cold heavy cream to stiff peaks, about 3 to 4 minutes with a hand mixer. Stop as soon as it holds its shape; overwhipped cream turns grainy.
4. Fold the two together. Stir about a third of the whipped cream into the chocolate base to loosen it, then gently fold in the rest in two additions with a spatula, cutting through the center and rotating the bowl until no white streaks remain.
5. Portion and chill. Divide the mousse among six small glasses or ramekins and refrigerate for at least 30 minutes, until set. It holds its shape for several hours if you're making it ahead.

Nutrition facts per serving

Nutrient	Amount
Serving size	1/2 cup (about 100 g)
Calories	300 kcal
Fat	31 g
Protein	4 g
Total carbs	22 g
Fiber	3 g
Erythritol (sugar alcohol)	~15 g
Net carbs	~4 g

The displayed estimate subtracts the listed fiber and the stated erythritol amount from total carbohydrate. Sugar alcohols differ, and an allulose-erythritol blend may not match the table, so use the actual product label and a defined counting method.¹ Compare the resulting serving estimate with a daily amount you already use; no site calculator decides how much room remains.

Tips and variations

• Stabilize it further: if you want a mousse firm enough to pipe, whip the cream to slightly firmer peaks and chill the finished mousse for a full hour instead of 30 minutes.
• Make it dairy-forward but lighter: swap up to half the cream cheese for extra whipped cream for a fluffier, less dense texture — expect a slightly softer set.
• Add texture: fold in a tablespoon of sugar-free chocolate chips or top each serving with a few raspberries and a sprig of mint; raspberries are one of the lowest-carb berries and add well under 1 g net carbs for a few berries.
• Boost the chocolate flavor: stir 1 oz of melted, unsweetened 100% baking chocolate into the base in step 2 for a deeper flavor — this adds roughly 1 g net carbs per serving.
• Sweetener swap: an allulose-erythritol blend browns and dissolves more smoothly than straight erythritol and is less likely to leave a cooling aftertaste in a cold dessert like this one.
• Serve it as part of a plan: account for this dessert separately. The meal template builder does not accept custom recipes, dessert slots, or a remaining-net-carb target.

How do you store keto chocolate mousse?

Keto chocolate mousse keeps well covered in the refrigerator for up to 4 days, and it also freezes for up to 2 months. Store it in the individual glasses or ramekins you served it in, covered with plastic wrap pressed against the surface to stop a skin from forming. To freeze, cover tightly; thaw overnight in the fridge before serving, and give it a quick stir if it separates slightly.

Because it's an uncooked, dairy-heavy dessert, always store it cold rather than at room temperature, and use clean utensils each time you portion it to keep it fresh for the full 4 days.

For more no-bake and baked keto sweets built the same way — a low- or zero-carb sweetener swapped for sugar and a low-carb flour swapped for wheat flour — see the full keto dessert recipes roundup.

Frequently Asked Questions

How many net carbs are in keto chocolate mousse?

This recipe runs about 4 g net carbs per 1/2-cup serving, from 22 g total carbs minus 3 g fiber and roughly 15 g of erythritol, which doesn't raise blood sugar.

Can I make keto chocolate mousse without cream cheese?

Yes — whip 2 cups of heavy cream to soft peaks, then fold in sifted cocoa powder and sweetener instead of building a cream-cheese base. The texture is lighter and less stable, so serve it the same day.

Why is my keto chocolate mousse runny?

The most common cause is under-whipped cream — it needs to hold stiff peaks before you fold it in — or a base that wasn't fully chilled. Refrigerating the finished mousse for a full hour instead of 30 minutes usually firms it up.

What is the best sweetener for keto chocolate mousse?

A powdered erythritol or allulose-erythritol blend dissolves smoothly and avoids the grainy texture granular sweeteners can leave in a cold, uncooked dessert. Straight erythritol works too but can add a cooling aftertaste for some people.

Is chocolate mousse keto-friendly if I use dark chocolate instead of cocoa powder?

It can be, as long as you use unsweetened or 85%+ dark chocolate and account for its carbs in your total, since even high-percentage dark chocolate has a few grams of sugar per ounce. Cocoa powder alone keeps the carb count lower and more predictable.

Works cited

1. Diet Review: Ketogenic Diet for Weight Loss — Harvard T.H. Chan School of Public Health, The Nutrition Source — August 19, 2026 https://nutritionsource.hsph.harvard.edu/healthy-weight/diet-reviews/ketogenic-diet/
2. Sugar Alcohols May Not Be as Safe as You Thought — Cleveland Clinic — August 19, 2026 https://health.clevelandclinic.org/what-to-know-about-sugar-alcohols
3. FoodData Central — U.S. Department of Agriculture, Agricultural Research Service — August 19, 2026 https://fdc.nal.usda.gov/

Article history

1. August 23, 2026Updated
2. August 19, 2026First published