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Keto Chocolate Mug Cake

4.92 from 74 votes
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This recipe may contain Amazon or other affiliate links. As an Amazon Associate I earn from qualifying purchases.

This moist single serving keto chocolate mug cake has 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.


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

  • Almond flour – mug cakes also work well with an 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 Lakanto or Swerve, 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 to 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.


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 are:

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 to enhance the rich chocolate taste!

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!
  • Pecans – pecan nuts turn this mug cake into a delicious mug brownie.
  • Keto Chocolate Frosting – to spread on top of the mug cake.

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Storage Instructions

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.

Frequently Asked Questions

When Should I Eat Mug Cakes

This keto chocolate mug cake is the perfect treat as a quick sweet breakfast, snack, or dessert.

How Many Carbs Are There In Keto Chocolate Mug Cake?

With only 5 grams of net carb per serve, it fits perfectly in your daily macros any time of the day to fix quick sweet cravings without sugar and add good fat to your body.

Allergy Swaps

If you are allergic to nuts, you can use the following substitutes:

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

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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.

Keto Chocolate Mug Cake

5.1gNet Carbs
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.
Prep: 5 minutes
Cook: 1 minute
Total: 6 minutes
Yield: 1 keto mug cake
Serving Size: 1 mug
4.92 from 74 votes


Toppings – optional

This recipe may contain Amazon or other affiliate links. As an Amazon Associate I earn from qualifying purchases.


  • 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.
Tried this recipe?Mention @sweetashoneyrecipes
Nutrition1 mug
Yield: 1 keto mug cake


Serving: 1 mugCalories: 317.5 kcal (16%)Carbohydrates: 10.8 g (4%)Fiber: 5.7 g (24%)Net Carbs: 5.1 gProtein: 11.4 g (23%)Fat: 27.7 g (43%)Saturated Fat: 15.6 g (98%)Polyunsaturated Fat: 1.4 gMonounsaturated Fat: 3.1 gTrans Fat: 0.1 gCholesterol: 186 mg (62%)Sodium: 337.8 mg (15%)Potassium: 145.6 mg (4%)Sugar: 1.3 g (1%)Vitamin A: 270 IU (5%)Vitamin B12: 0.5 µg (8%)Vitamin D: 1 µg (7%)Calcium: 217.3 mg (22%)Iron: 2.5 mg (14%)Magnesium: 31.5 mg (8%)Zinc: 1 mg (7%)
Carine Claudepierre

About The Author

Carine Claudepierre

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

I have an Accredited Certificate in Nutrition and Wellness obtained in 2014 from Well College Global (formerly Cadence Health). I'm passionate about sharing all my easy and tasty recipes that are both delicious and healthy. My expertise in the field comes from my background in chemistry and years of following a keto low-carb diet. But I'm also well versed in vegetarian and vegan cooking since my husband is vegan.

I now eat a more balanced diet where I alternate between keto and a Mediterranean Diet

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

All my recipes are at least triple tested to make sure they work and I take pride in keeping them as accurate as possible.

Browse all my recipes with my Recipe Index.

I hope that you too find the recipes you love on Sweet As Honey!

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    41 Thoughts On Keto Chocolate Mug Cake
    1 2
  1. 5 stars
    This is delicious! I used allulose for the sweetener without any adjustment and it was just the right sweetness level for us. I left out the chips, as I didn’t have any. It definitely scratched the itch to have something chocolatey and brownielike.

  2. 5 stars
    I’ve made this several times already. So easy and delicious. I put 1 square of Lindt dark chocolate in the centre for extra gooey-ness.
    Thank you for this recipe. It really hits the spot when I’m craving for cake.

  3. 5 stars
    I absolutely love it!I literally just munched mine within a minute . My hubby loved it too. Thank you for sharing!

  4. 5 stars
    I Love this Chocolate Mug Cake recipe! I am on the Candida Diet and this is candida friendly recipe. Really helps when I’m craving cake. It’s so quick and easy to make.

  5. 5 stars
    I love the chocolate mug cake and today I was going to look at your site to see if there were other mug cakes and guess what, my email today from you had just that! I was glad to get the lemon. peanut butter, and cinnamon recipes for more mug cakes. Thank you so much. They have really improved my breakfast menus.

    • Oh thank you ! I also like them for breakfast, so easy and fast to prepare. Keep an eye around the blog, I promise more tasty mug cakes to come soon. XOXO Carine.

  6. 5 stars
    The only thing I crave on the Atkins Diet is Chocolate from time to time. Just made this delicious Mug Cake and you don’t know how happy I am that you shared this recipe. I made it just as described, however I topped mine with 1/4 up of Blueberries and a couple of tbs. of sugar free whipped topping. Thanks again.

  7. I don’t have the sachets, i have granulated stevia. how much should be used?
    I really wish for all these recipes people would give more alternatives for sweeteners

    • I am not sure what you called granulated stevia, if it is pure stevia it is the same as used in this recipe in the little packet. One packet is 1 gram so use 1 g of any stevia, powdered or granulated. Taste and adjust before baking regarding your taste. The recipe has alternatives, it says either use 2 tablespoon erythritol which is a granulated stevia erythritol combo – swerve brand in US. Enjoy the mug cake. XOXO Carine.

      • Would honey or maple syrup work for any of your mug cakes or other sweet treats. I have tried all sweeteners and they all including monk fruit with erythritol cause me to itch. I have a sweet tooth and love chocolate please help me.

    • Not really as flaxmeal contains way more fiber than almond flour and you will need way less. However you can try my flaxseed mug cake if you prefer to bake with flaxmeal. Let me know how it goes, XOXO Carine.

    • What a great idea! I love hazelnuts and chocolate, such a great combo. Thanks for sharing here! Enjoy the recipes on the blog and thanks for trying some ! XOXO Carine.

    • Thanks for trying my mug cake recipe. I am so glad you enjoy it! Topping can be simple, try unsweetened whipped cream of a drizzle of melted sugar free chocolate and dollop of peanut butter. Yum! xoxo Carine

    • I am so glad you enjoy this mug cake for breakfast. It contains coconut flour, which means lots of fiber that keep you full for long! I hope you find more delicious recipes to try on my blog. XOXO Carine.

  8. 5 stars
    A microwave dessert that actually tastes fabulous.
    I boo-boo’d on the recipe by adding 1 T of coconut flour instead of 1 t, and no matter, the recipe turned out fabulous.

    I made a chocolate ganache frosting to top it…heavenly combination:
    1T butter
    1 T almond milk
    1/3 C sugar free Chocote wafers
    1/2 t chocolate extract

    Thank-you for this awesome tasting FAST dessert. I’ve made it twice, perfect!!!

    • WOW! That chocolate ganache is a must try ! Thanks so much for sharing your whole recipe in comment, I am pretty sure plenty of my fellow reader will give this a go. Trust, me I will ! Thanks so much for taking some time to add such a positive comment and adds on. Love from NZ. XOXO Carine.

  9. If we cook it to have it for the next day, what is the best way to preserve it? Can it last outside in room temperatura or should I put it in the fridge?

    • I wouldn’t recommend to microwave a mug cake ahead. Microwave baking must be eaten within 30 minutes or the texture gets weird, chewy, dry out. If you cook this batter in the oven it will store well at room temperature as a regular muffin but don’t store baked goods in the fridge – the taste and texture change a lots. Enjoy the low carb recipes on the blog. XOXO Carine.

  10. 5 stars
    This was awesome i used 2tbsn sweetener and dark chocolate powder.
    Then replaced the peanut butter with almond butter, tbsn butter and tbsn of dark cocoa powder and melted together. . oh my word

  11. What is the reason for the almond meal or ground flax alternate? I’ve recently discovered that anything I make with almond flour or meal, I just cannot stand the taste. It’s so weird.. but coconut flour is doable, so how would this work by either leaving it out or increasing the coconut flour?

    • If you increase coconut flour it will be crumbly and won’t hold together.If you don’t like almond meal or flaxmeal you can use different nut or seed ground like hazelnut ground or even oat flour – not low carb tho. Low carb baking recipes often calls for a mix of almond meal and coconut flour to get the perfect texture. Coconut flour is very liquid absorbent and makes baked goods crumbly if not balanced with a different flour. You can also use tapioca flour, arrowroot flour but they are not low carb as well. Enjoy the recipe. XOXO Carine.

  12. 5 stars
    I never leave comments but I just have to cause this is THE best mug cake recipe ever!!! It’s so moist and perfectly sweet to satisfy a sweet craving. Thank you for sharing this awesome recipe!!!

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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 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.