Best Keto Brownie Mug Cake

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Keto mug cakes are ideal for busy health-conscious dieters who follow a whole foods based paleo approach. They can be prepared in a fraction of time and are great when you crave something sweet.

Compared to traditional mug cakes, this cake is rich, chocolatey and tastes just like your favourite brownie. It's low in net carbs, high in fibre and high in healthy fats. To keep this treat moist, I used grated dark chocolate, ground chia seeds and coconut oil. Remember to add a dash of cinnamon and coffee - they do make a difference as they both enhance the flavour of any chocolate treats.


Nutritional values (per mug cake)

6.9 grams 7.5 grams 8 grams 38.3 grams 28.3 grams 397 calories
Total Carbs14.4grams
Net Carbs6.9grams
of which Saturated28.3grams
Magnesium82mg (20.5% RDA)
Potassium308mg (15.4% EMR)

Macronutrient ratio: Calories from carbs (7%), protein (8%), fat (85%)

Ingredients (makes 2 mug cakes)

  • Optionally, add a dollop of whipped cream, coconut cream or creme fraiche
  • Not sweet enough? If you just started following a low-carb diet, then you may find some recipes not sweet enough. You can add a few extra drops of stevia or a little more erythritol or Swerve to suit your palate.
  • Avoiding caffeine? If you're using decaf coffee, opt for naturally caffeine-free chicory coffee or Swiss water process decaf coffee which is chemical-free.


  1. Place all the grated chocolate and dry ingredients in bowl and combine well. Best Keto Brownie Mug Cake
  2. Add the egg, coconut oil and coffee. Mix until combined. Best Keto Brownie Mug Cake
  3. Divide the mixture between 2 mugs. The mug cake will raise when cooked so use a large enough mug or cup (fill it up to no more than half). Best Keto Brownie Mug Cake
  4. Microwave on high for 70-90 seconds, until cooked through.
    Tips for cooking in the oven: If you don't have a microwave, I suggest you make 4-8 servings at once. Preheat the oven to 175 C / 350 F and cook for about 12-15 minutes or until cooked in the centre. Best Keto Brownie Mug Cake You can optionally top the mug cake with whipped cream or creamed coconut milk and or creme fraiche. Best Keto Brownie Mug Cake

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By Martina Slajerova
Creator of

I changed the way I ate in 2011, when I was diagnosed with Hashimoto’s, an autoimmune disease that affects the thyroid. I had no energy, and I found it more and more difficult to maintain a healthy weight.

That’s when I decided to quit sugar, grains, and processed foods, and to start following a whole-foods-based ketogenic approach to food.

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Comments (9)

Absolutely delicious!! So easy, quick and super yummy. What else can we ask for...?? Thank you so much for sharing. New to your blog and super happy I found u! Congrats on ur good work!


Thank you so much Paula!


This was really tasty! I used ground flax seeds instead of ground chia seeds (because that's what I had) and it worked very well. I also added a little bit of vanilla extract because I always put vanilla in chocolate anything.  😉  I will definitely make this again -- thanks for sharing!  😊


Thank you! That's right, vanilla is a great addition to anything chocolate! 😊


Tried this for the first time today. Wow absolutely delicious and feels very indulgent served with a little heavy cream. Would not tell this from a carb loaded chocolate pudding. Very moist like a choc fudge cake. Will add this to my list of favourites. The fact it only takes minutes to make is an extra bonus.


Thank you very much! I'm glad you liked it! 😊


Ok.  I'm going to give this recipe a try.  I made a vanilla version of a mug cake about 3 weeks ago and it was NOT good.  Having said that your ingredients look very different.  It had almond flour, I remember and it was just dry.  I will give this a shot and report back.  Stay tuned!


There are many different recipes - have a look at these (also check the recipe notes). There are some tips for substitutions that may help:
Apart from the Chocolate & Coconut Mug Cake (which tends to be a bit dry), the other recipes are quite moist. I prefer using one egg per mug cake, or substitute it with another similar ingredient that adds moisture (in this case chia seeds and grated chocolate, plus extra liquids). I hope this helps 😊


This brownie was so yummy and I have more for later 😊 I love quick and easy recipes like these, please keep them coming!


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