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Keto Mug Cake Recipe

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4.99 from 135 votes
By Carine Claudepierre -
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This Keto Mug Cake Recipe is an easy keto chocolate mug cake perfect to fix your sweet tooth and cake craving in less than 2 minutes and 3.7 grams of net carbs.

Bonus, this mug cake is also gluten-free with a dairy-free option.

Keto Mug Cake

What’s A Keto Mug Cake?

A Keto Mug Cake is like a traditional cake but it’s made in a mug, in just about 2 minutes in the microwave.

To be keto-friendly, it uses low-carb flour, unsweetened cocoa, and sugar-free sweeteners to reduce the net carbs per serving.

Why You’ll Love This Mug Cake

This keto mug cake is an absolutely delicious keto dessert and most people won’t be able to tell it’s keto.

It’s also:

  • Ready In Under 5 Minutes
  • Gluten-Free
  • Sugar-Free
  • Rich In Chocolate Cake Flavors
Keto Mug Cake

How To Make Keto Mug Cake

Like other mug cake recipes, this keto mug cake is so easy to make.

Ingredients

  • Almond FlourAlmond flour is a healthy keto-friendly flour that can be used in many almond flour recipes. Prefer ultra-fine almond flour over a grittier almond meal.
  • Baking Powder
  • Cocoa Powder – Make sure to use unsweetened cocoa powder as some manufacturers include sugar in their mix.
  • Erythritol – Erythritol is one of my favorite keto-friendly sweeteners.
  • Coconut OilCoconut oil is full of healthy fat, but you can also use melted butter.
  • Almond Milk – You must use unsweetened almond milk to keep this keto mug cake low in carbs.
  • Egg – I prefer free-range eggs at room temperature. You can take them out of the fridge up to one hour before baking.
  • Vanilla Extract
  • Sugar-Free Chocolate Chips – Use either store-bought chocolate chips or make my Sugar-Free Chocolate Chips Recipe.

Making The Batter

Take the egg and almond milk out of the fridge about 30 minutes before preparing the mug cake. Cold ingredients tend to skew the texture.

Melt the coconut oil in the microwave but make sure it isn’t too hot. Coconut oil melts at 73°F (23°C), so all you need is a very brief warm-up.

Combine all the liquid ingredients in a mixing bowl.

Add the dry ingredients gradually: almond flour, cocoa powder, baking powder, crystal sweetener, and half of the sugar-free chocolate chips.

Once the keto mug cake batter is consistent, pour it into a tall mug greased with coconut oil.

Baking The Mug Cake

You can bake the keto mug cake in the microwave, air fryer, or oven.

Microwave

Place the mug in the middle of your microwave and cook it on high (900W) for 60 seconds.

Check the texture of the keto mug cake. If it’s still raw, keep cooking in 10-second bursts up to 90 seconds in total.

Air Fryer

Place the mug in the center of the air fryer basket and cook it for 5 to 8 minutes at 350°F (180°C) until a pick inserted in the middle of the keto mug cake comes out clean of crumbs.

Baking

Preheated the oven to 350°F (180°C) and bake the keto mug cake for 15 to 18 minutes or until a pick inserted in the center of the mug cake comes out without crumbs.

Add-Ons

Once you’ve cooked the keto mug cake, add the rest of the sugar-free chocolate chips on top.

If you like to vary the taste of your mug cake, you can:

  • Add a tablespoon of peanut butter to make a chocolate peanut butter mug cake
  • Add berries to make a chocolate raspberry mug cake
  • Add pecans to make a brownie mug cake.
Keto Mug Cake

Storage Instructions

You can prepare this keto mug cake batter ahead and store it in the mug wrapped with plastic wrap to keep it sealed. Store the batter for up to 24 hours in the refrigerator.

It’s not possible to store the keto mug cake for longer than 30 minutes once it has been baked as it would dry out very fast.

If you cook the mug cake in the oven, you might be able to store it for up to 24 hours in the fridge.

Reheat this low-carb treat in the microwave.

Allergy Swaps

If you have allergies to some of the ingredients, you can do the following substitution options:

  • Almond Flour – If you are allergic to almond flour, you can replace it with the same measurement of sunflower seed flour, or with one tablespoon of coconut flour.
  • Erythritol – Erythritol can be gut upsetting for some. If that’s the case, swap it for allulose, tagatose, or xylitol.
  • Almond Milk – You can replace the almond milk with any unsweetened plant-based milk such as coconut milk, soy milk, or oat milk.

Frequently Asked Questions

Can I use coconut flour instead of almond flour?

Yes, you can swap 3 tablespoons of almond for 1 tablespoon of coconut flour.
The cake won’t be as large but it will still taste delicious. Or simply use my coconut flour mug cake recipe to use coconut flour.

Can I skip the egg?

No, the batter won’t hold together egg-free. Otherwise, use my vegan keto mug brownie recipe.

Do I need to use sugar substitutes?

You can make this mug cake with any sweetener you like, including non-sugar-free ones if you’re not on a keto diet.

How many carbs are in a keto mug cake?

This keto mug cake with chocolate contains only 3.7 grams of net carbs.

Keto Mug Cake
Keto Mug Cake

Keto Mug Cake Recipe

3.7gNet Carbs
This 90-second Keto Mug Cake Recipe has a delicious chocolate crumb and no sugar added.
Prep: 5 mins
Cook: 2 mins
Total: 7 mins
Yield: 1 keto mug cake
Serving Size: 1 mug cake

Nutrition

Net Carbs 3.7g
Fat 34.6g
Protein 10.7g
Calories 370.8kcal
4.99 from 135 votes
Review Print

Want My Kitchen Equipment?

Ingredients

Instructions

  • Grease a microwave-proof ramekin or tall coffee mug with coconut oil. Choose one that is at least 2.5-inch tall and 3.5-inch wide. This will prevent the mug cake from overflowing when microwaving. Set aside.
  • In a small bowl, whisk the egg, melted coconut oil, almond milk, and vanilla extract. Make sure the egg is not cold, or it will solidify the coconut oil, forming lumps. For a moister cake, use melted butter. For a chewier cake, use melted coconut oil.
  • Stir in almond flour, cocoa powder, baking powder, erythritol, and half the amount of sugar-free chocolate chips.
  • Pour the batter into the prepared mug cake.
  • Microwave on high (800W) for 80-90 seconds or until set in the center. Make sure you check the microwave power. If yours is higher (1000W), you may have to microwave the mug cake for only 60-70 seconds to get the same texture.
  • Sprinkle the remaining chocolate chips on the hot mug cake and cool for 60 seconds in the mug before eating.
  • Serve with a dust of sugar-free powdered erythritol and a dollop of unsweetened whipped cream on top (use coconut cream for dairy-free paleo option).
Egg: this recipe is not working with flaxseed eggs or egg replacers. Make sure the egg is at room temperature to prevent the coconut oil from forming lumps. 
Vanilla: if using vanilla stevia drops, decrease erythritol to 1 tablespoon, or the mug cake will be too sweet.
Chocolate Chips tips: toss chocolate chips in some almond flour, or coconut flour helps suspend them in your mug batter.
My Recipe Notes

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Nutrition Facts
Keto Mug Cake Recipe
Amount Per Serving (1 mug cake)
Calories 370.8 Calories from Fat 311
% Daily Value*
Fat 34.6g53%
Saturated Fat 17.6g110%
Trans Fat 0.1g
Polyunsaturated Fat 1.2g
Monounsaturated Fat 2.6g
Cholesterol 186mg62%
Sodium 344.6mg15%
Potassium 69mg2%
Carbohydrates 13.4g4%
Fiber 9.7g40%
Sugar 0.9g1%
Protein 10.7g21%
Net Carbs 3.7g
Vitamin A 270IU5%
Vitamin B12 0.5µg8%
Vitamin D 1µg7%
Calcium 72.1mg7%
Iron 1.7mg9%
Magnesium 6mg2%
Zinc 0.7mg5%
* Percent Daily Values are based on a 2000 calorie diet.
Carine Claudepierre

About The Author

Carine Claudepierre

Hi, I'm Carine, the food blogger, author, recipe developer, published author of a cookbook, and founder of Sweet As Honey.

I'm passionate about sharing easy, tasty recipes that are both delicious and healthy

Cooking and Baking is my true passion. In fact, I only share a small portion of my recipes on Sweetashoney. Most of them are eaten by my husband and my two kids before I have time to take any pictures!

Browse all my recipes with my Recipe Index.

I hope that you too find the recipes you love on Sweetashoney!

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Disclaimer

The recipes, instructions, and articles on this website should not be taken or used as medical advice. You must consult with your doctor before starting on a keto or low-carb diet. The nutritional data provided on Sweetashoney is to be used as indicative only. The nutrition data is calculated using WP Recipe Maker. Net Carbs is calculated by removing the fiber and some sweeteners from the total Carbohydrates. As an example, a recipe with 10 grams of Carbs per 100 grams that contains 3 grams of erythritol and 5 grams of fiber will have a net carbs content of 2 grams. Some sweeteners are excluded because they are not metabolized. You should always calculate the nutritional data yourself instead of relying on Sweetashoney's data. Sweetashoney and its recipes and articles are not intended to cure, prevent, diagnose, or treat any disease. Sweetashoney cannot be liable for adverse reactions or any other outcome resulting from the use of recipes or advice found on the Website.