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Keto Chocolate Mug Cake

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4.91 from 302 votes
By Carine - - 40 Comments

A moist single serving keto chocolate mug cake with the best fudgy chocolate cake texture and only 5 grams of net carbs per serving! Plus, this chocolate mug cake keto recipe is also gluten-free, made with coconut flour and almond flour.

It’s that time of the day. You crave that chocolate cake you saw at the bakery. But then you go back home and realize you have nothing in your cupboard to fix that chocolate craving. So that’s when keto chocolate mug cake recipes come to the rescue.

What is a keto chocolate mug cake?

A keto chocolate mug cake is a one-serve, 90-second microwave chocolate cake recipe made with low-carb flour and sugar-free sweeteners.

As a result, a keto mug cake recipe contains minimal carbs but brings out the same decadent chocolate, moist crumb you expect from a chocolate cake.


chocolate mug cake keto

How to make keto chocolate mug cake?

This keto chocolate mug cake recipe is the easiest, quick keto chocolate cake you will make. A keto chocolate mug cake is made with only 5 ingredients.

Ingredients for low carb chocolate mug cake

All you need to make this recipe are the nourishing low-carb ingredients below.

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  • Almond flour – mug cakes also work well with almond meal. However, almond meal is coarse, and not everyone enjoys the grainy texture it adds to keto chocolate mug cakes. So if you are new to keto baking, always choose ultra-fine almond flour. It makes cakes and cookies with a similar texture to wheat-based baked goods. Learn more about keto flours.
  • Coconut flour – this keto chocolate mug cake with coconut flour has the best texture! The combination of both flours creates the fluffiest cake crumb. Of course, if you don’t have coconut flour, you can replace it with 2 tablespoons of extra almond flour.
  • Erythritol or any sugar-free crystal sweetener you like, such as allulose, xylitol, or a few drops of liquid stevia.
  • Egg – this easy mug cake keto recipe requires an egg. Try my egg-free keto chocolate mug cake for a vegan keto alternative.
  • Unsweetened cocoa powder
  • Baking powder 
  • Vanilla extract
  • Sugar-free chocolate chips  – I highly recommend adding a pinch of sugar-free chocolate chips in your mug cake for an extra chocolate flavor.

Combining ingredients

In a small mixing bowl, beat eggs, melted coconut oil, vanilla extract, and almond milk.

Then stir in the flours, sweetener, baking powder, and unsweetened cocoa powder.

Finally, when the batter is thick and evenly combined, stir in the sugar-free chocolate chips.

Baking keto mug cakes

The trickiest part of keto mug cakes is to bake them perfectly, to stay moist in the center but not liquid. My tips to make the best single-serving mug cake recipe in the microwave is to:

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  • Use a microwave-safe tall coffee mug – from 8-15 oz. In fact, a tall coffee mug gives the keto mug cake room to rise high, adding fluffiness, and also it prevents the mug cake from overflowing from the mug.
  • Check microwave power and adjust baking time – like ovens, microwaves do have power settings. Don’t assume that all microwaves are set at the same powder. It’s not true. However, the truth is some microwave settings can’t be changed. It means that they are sold with a set up of 600W, 900W, or 1200W. So below, I listed the microwave baking time based on the power of each microwave:
    • 600W – 130 seconds baking time
    • 900W – 90 seconds baking time
    • 1200 W- 60 seconds baking time
  • Serve immediately – a mug cake dries out quickly, don’t wait, and serve within 5 minutes to enjoy its full flavor.

keto mug cake chocolate

Serving ideas

This keto low-carb mug cake is even better served with toppings! Below I listed some options that are keto-friendly to make this chocolate mug cake even tastier:

  • Whipped cream – can use dairy-free coconut whipped cream too for a paleo chocolate mug cake.
  • Melted sugar-free chocolate.
  • Natural peanut butter – as seen in my pictures, I added a drizzle of melted sugar-free chocolate and a drizzle of peanut butter on top of my low-carb mug cake. This is the most decadent addition to chocolate!


Unfortunately, baked keto mug cakes won’t store well. A keto mug cake recipe must be served immediately within 5 minutes after baking, or it dries out.

You can make the batter ahead 24 hours before serving. First, make the batter and fill a coffee mug with it. Then, wrap the top of the mug with plastic wrap and store the uncooked mug cake in the fridge overnight. T

hen, bake the keto chocolate mug cake in the microwave when needed.

Best time to serve

This keto chocolate mug cake is perfect as a quick sweet breakfast, snack, or dessert. With only 5 grams net carb per serve, it fits perfectly in your daily macros any time of the day to fix quick sweet cravings without sugar and adding good fat to your body.

Nut-free mug cake

If you are allergic to nuts, you can swap:

  • Almond flour by the same amount of sesame seed flour.
  • Almond milk – use any keto dairy-free milk like coconut milk, hemp milk.

More keto mug cake recipes

I have plenty of other easy keto mug cake recipes for you to try as quick keto desserts or keto snacks. Below I listed my other keto mug cake flavors for you to try.

Did you try this keto mug cake chocolate recipe? Share a comment or review below!

 xoxo Carine

Recipe Card

Keto Chocolate Mug Cake

Low Carb Chocolate mug cake recipe with Coconut Flour. Only 4.7 g net carb per serve and 130 kcal., 9 g protein. Gluten free, keto, sugar free and paleo.
5.1gNet Carbs
4.91 from 302 votes
Prep Time: 5 mins
Cook Time: 1 min
Total Time: 6 mins
Net Carbs 5.1g
Fat 27.7g
Protein 11.4g
Calories 317.5kcal
Author: Carine Claudepierre
1 keto mug cake
Keto Chocolate mug cake recipe with Coconut Flour and Almond Flour. A moist easy keto mug cake ready in 5 minutes to fix all your chocolate cravings.

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Net Carbs
4.91 from 302 votes
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Toppings - optional

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  • In a small mixing bowl, whisk egg, melted coconut oil, unsweetened almond milk, and vanilla extract.
  • Stir in almond flour, coconut flour, baking powder, erythritol, unsweetened cocoa powder. When the batter is thick and evenly combine, stir in sugar-free chocolate chips.
  • Pour into a tall coffee mug (8-15 fl oz) or microwave-safe ramekin.
  • Microwave for 60-90 seconds. Start with 60 seconds, and then increase by 30-second bursts if needed. It is cooked when the top of the cake is firm and rises up in the mug.
  • Enjoy immediately. If you like, drizzle one teaspoon of creamy peanut butter on the top and melted sugar-free chocolate. 
Milk options: you can use the milk of your choice like coconut milk, soy milk, or regular cow milk.
Baking alternative: if you don't have a microwave, grease an oven-proof ramekin with coconut oil, fill it in, and bake in a hot oven preheated to 350°F (180°C) for 10-15 minutes or until a skewer inserted in the middle of the cake comes out clean.
Sweetness: you can increase the sweetness of your mug cake by using 3 tablespoons of erythritol.
Almond meal swap: for a nut-free recipe swap the almond meal for sunflower seed flour.
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Nutrition Facts
Keto Chocolate Mug Cake
Amount Per Serving (1 mug)
Calories 317.5 Calories from Fat 249
% Daily Value*
Fat 27.7g43%
Saturated Fat 15.6g98%
Trans Fat 0.1g
Polyunsaturated Fat 1.4g
Monounsaturated Fat 3.1g
Cholesterol 186mg62%
Sodium 337.8mg15%
Potassium 145.6mg4%
Carbohydrates 10.8g4%
Fiber 5.7g24%
Sugar 1.3g1%
Protein 11.4g23%
Vitamin A 270IU5%
Vitamin B12 0.5µg8%
Vitamin D 1µg7%
Calcium 217.3mg22%
Iron 2.5mg14%
Magnesium 31.5mg8%
Zinc 1mg7%
Net Carbs 5.1g
* Percent Daily Values are based on a 2000 calorie diet.


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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 sugar alcohols 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 sugar alcohols 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.

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