Keto Fat Bombs (Chocolate Peanut Butter)

Keto fat bombs are small, high-fat, low-carb bites — this chocolate peanut butter version runs about 2 g net carbs per piece and takes 10 minutes of active prep plus 45 minutes in the freezer to set, no oven required. They're built from peanut butter, coconut oil, cocoa powder, and a sugar-free sweetener, so nearly every calorie comes from fat, which is exactly the point: a fat bomb is designed to be a fast, portable way to raise your fat intake or curb hunger between meals on keto.

A fat bomb isn't a dessert built around sugar with fat as an afterthought — it's the reverse. These are calorie-dense on purpose, so one fat bomb is genuinely one serving. This recipe makes 16, freezes well, and pairs the classic chocolate-peanut-butter combination with a simple four-step method: melt, whisk, portion, freeze. It rolls up alongside 11 other options in our keto dessert recipes roundup if you want more low-carb sweets to rotate through.

How many net carbs are in a keto fat bomb?

Each chocolate peanut butter fat bomb has an estimated 2 g net carbs when the batch is divided into 16 equal portions and the stated erythritol deduction is used. Peanut butter, cocoa and sweetener values vary by product. Recalculate substitutions from the complete ingredient totals, then divide by the number of portions; the net-carb calculator does not analyze recipes. See the keto food list for less calorie-dense food options.

What ingredients do you need for chocolate peanut butter fat bombs?

Six ingredients: peanut butter, coconut oil, unsweetened cocoa powder, a powdered keto sweetener, vanilla extract, and salt — all pantry staples, no specialty keto products required beyond the sweetener.

• 3/4 cup (192 g) natural creamy peanut butter, no added sugar — the main protein and fat source; check the label for added sugar or hydrogenated oils, which some mainstream brands sneak in. Contributes about 27 g net carbs to the whole batch.
• 1/2 cup (112 g) coconut oil, melted — pure fat, 0 g net carbs, and what makes the mixture firm up solid in the freezer.
• 3 tablespoons (15 g) unsweetened cocoa powder — for chocolate flavor; mostly fiber, so it adds only about 4 g net carbs to the batch.
• 1/4 cup (48 g) powdered erythritol, allulose, or a monk-fruit/erythritol blend — sweetens without raising blood sugar; use a powdered (not granular) form so it dissolves smoothly into the fat.
• 1 teaspoon vanilla extract — rounds out the flavor; negligible carbs.
• 1/4 teaspoon fine sea salt (plus flaky salt for topping, optional) — balances the sweetness and richness.

How do you make keto fat bombs?

Melt the coconut oil, whisk in the peanut butter and dry ingredients, portion into a mini muffin tin or mold, then freeze until firm — about 10 minutes of hands-on work total.

1. Line a mini muffin tin with 16 paper or silicone liners, or set out a silicone fat-bomb mold.
2. Melt the coconut oil in a microwave-safe bowl in 20-second bursts, or over low heat on the stovetop, until fully liquid.
3. Whisk the peanut butter into the melted coconut oil until smooth and fully combined.
4. Sift in the cocoa powder and powdered sweetener, whisking until no lumps remain and the mixture is glossy.
5. Stir in the vanilla extract and fine sea salt.
6. Divide the mixture evenly among the 16 liners or mold cavities, about 1 tablespoon each. Sprinkle with flaky salt if using.
7. Freeze until firm, about 45 minutes.
8. Pop the fat bombs out of the liners or mold and store in an airtight container in the fridge or freezer.

Nutrition facts per fat bomb

Nutrient	Amount
Calories	130 kcal
Total fat	13 g
Total carbohydrates	6 g
Fiber	1 g
Erythritol (sugar alcohol)	3 g
Net carbs	2 g
Protein	3 g

Values are calculated from standard USDA ingredient macros for natural peanut butter, coconut oil, and unsweetened cocoa powder, for a batch split into 16 equal fat bombs (about 28 g each). Erythritol and other non-glycemic sweeteners are subtracted from total carbs along with fiber to get net carbs, matching how most keto trackers count them.¹

Tips and variations

The base recipe is easy to customize: swap the nut butter, adjust the sweetness, or add a topping, without changing the core method or the net-carb count much.

• Nut-butter swaps: almond butter or sunflower seed butter (for a nut-free version) both work 1:1 in place of peanut butter, with a similar net-carb count.
• Extra crunch: fold in a tablespoon of chopped pecans or a sprinkle of unsweetened shredded coconut before freezing.
• Darker chocolate flavor: increase the cocoa powder to 1/4 cup and add an extra tablespoon of sweetener to balance the added bitterness.
• Firmer, room-temperature-stable bombs: swap half the coconut oil for melted cocoa butter, which holds its shape better outside the freezer.
• Dairy-free and vegan: every ingredient here is already dairy-free; the recipe is vegan as written.

How do you store keto fat bombs?

Keto fat bombs keep in the fridge for up to two weeks or in the freezer for up to three months, stored in an airtight container. Because they're mostly fat, they soften quickly at room temperature — pull only what you plan to eat, and keep the rest chilled. They also travel well in a small cooler bag if you want a portable keto snack.

Frequently Asked Questions

How many carbs are in a keto fat bomb?

This chocolate peanut butter version has about 2 g net carbs per fat bomb, based on a batch of 16. The exact number depends on the brand of peanut butter and sweetener you use, so it's worth double-checking with the net-carb calculator if you swap ingredients.

What is a fat bomb, and why do people eat them on keto?

A fat bomb is a small, high-fat, low-carb snack designed to boost fat intake or curb hunger between meals. They're popular in the first weeks of keto, when appetite and cravings can be harder to manage.

Can I use a different nut butter?

Yes. Almond butter swaps in evenly, and sunflower seed butter works for a nut-free version. Both have a similar net-carb count to peanut butter, so the recipe's math holds up.

Do fat bombs need to stay in the freezer?

They set up in the freezer, but once firm they hold their shape in the fridge for up to two weeks. Room temperature will soften them quickly since they're mostly fat, so store them chilled.

Are fat bombs good for weight loss on keto?

They can fit a weight-loss plan, but they're calorie-dense, so portion matters — one fat bomb is one serving, not a handful. If a stall shows up despite tracking carbs, fat bomb portion creep is a common, overlooked cause.

Works cited

1. 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
2. FoodData Central: Peanut Butter, Smooth Style, Without Salt — U.S. Department of Agriculture — August 19, 2026 https://fdc.nal.usda.gov/

If you use this recipe, account for it separately: the meal template builder provides breakfast, lunch and dinner ideas and does not include snack slots. It does not set portions or daily macro amounts.

Article history

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