You are going to love this moist keto chocolate mug cake made with coconut flour. Enjoy it straight out of the mug or transfer onto a plate and smother it with sugar free chocolate sauce! Low carb and gluten free.
After making this rather delicious sugar free lemon mug cake, I decided I needed a chocolate counterpart. Firstly, because mug cakes are my new passion, and secondly, because chocolate is one of my oldest, dearest friends.
I used the recipe for the lemon mug cake as a starting point and began to experiment, swapping out lemon juice with cream and almond flour with coconut flour. A bit of vanilla extract here, another teaspoonful of cacao powder there – and after five attempts this chocolatey beauty was born!
How to make the best ever keto chocolate mug cake:
1.) In a bowl, combine your dry ingredients – coconut flour, baking powder, cacao powder, sweetener. Make sure there are no lumps.
2.) Add your wet ingredients – the egg, cream and vanilla extract. Mix well.
3.) Stir in the chocolate chips and let the batter rest for a minute.
4.) Melt 1/2 tsp butter each in 2 mugs or 6 oz ramekins (30 seconds) and grease the insides. This is an important step if you want to turn your mug cakes out onto a plate. Divide the batter between the mugs/ramekins.
Microwave on high for 1 1/2 minutes. Don’t microwave any longer or your cakes will become dry.
5. Enjoy straight out of the ramekin or wait until the cake has cooled a bit before you turn it out onto a plate.
6.) For an optional chocolate sauce, melt 2 tbsp sugar free chocolate chips and 1 tbsp butter.
I like to start the chocolate chips off in the microwave (30 seconds, no more) and then put them in a water bath (place a small bowl with the chocolate chips into a larger bowl filled with boiling water).
Stir until liquid and add 2-3 tbsp cream or milk and stir until smooth and pourable.
Tips and tricks
The cake looks a bit soft when straight out of the microwave. Resist the urge to blitz it for another 30 seconds. It dries out easily!
If you want to turn it out onto a plate, wait until it has cooled a little so it does not fall apart.
Make sure you level your tablespoons of coconut flour to use the correct amount. Coconut flour is terribly absorbent, that’s why it took me so many tries to get the ratio right.
Stir your dry ingredients really well, to ensure there are no lumps. I couldn’t find a sieve, so simply pressed it with my fingers, which was kind of fun.
I like to use cacao powder instead of cocoa powder. Cacao powder is unprocessed, which means it retains important nutrients and antioxidants. If you are using cocoa powder, which is stronger in taste and darker in colour, you may have to reduce the amount stated in the recipe.
Alternatively, make your own sugar free chocolate chips! As you can see in the post I linked to, it’s really simple and they taste absolutely delicious 🙂
Toppings and variations
If you don’t like the idea of a chocolate sauce, you could eat this keto chocolate mug cake with sugar free ice cream or some whipped cream and berries.
As a flavour variation, try 1 tbsp of peanut or almond butter dunked in the batter before microwaving.
Don’t like coconut flour? Use 3 tbsp of extra fine almond flour instead! (If you’re using ground almonds or coarse almond flour, use 4 tbsp).
Use coconut cream instead of double / heavy cream for dairy free!
Can you make this recipe in the oven?
Yes! Try 180 Celsius / 356 Fahrenheit for 10-15 minutes. Alternatively, try out my sugar free chocolate cupcakes, they’ve got rave reviews 🙂
Try my other mug cakes:
- Keto Peanut Butter Mug Cake
- Cinnamon Swirl Coconut Flour Mug Cake
- Low Carb Chocolate Pumpkin Mug Cake
- Keto Carrot Cake For Two (Sugar Free)
Keto Triple Chocolate Mug Cake
- 2 ramekins (3.5 inch, 6 ounce capacity)
- In a bowl, combine your dry ingredients - coconut flour, baking powder, cacao powder, sweetener. Make sure there are no lumps.
- Add your wet ingredients - the egg, cream and vanilla extract. Mix well.
- Stir in the chocolate chips and let the batter rest for a minute.
- Melt 1/2 tsp butter each in 2 mugs or ramekins (30 seconds) and grease the insides. This is an important step if you want to turn your mug cakes out onto a plate. Divide the batter between the mugs/ramekins.
- Microwave on high for 1 1/2 minutes. Don't microwave any longer or your cakes will become dry.
- Enjoy straight out of the ramekin or turn out onto a plate. See post and notes for an optional chocolate sauce!
This post was first published in 2018. It was updated in January 2020 with new images and recipe tips.
This post contains affiliate links. If you click on one of these links and purchase a product as a result, I may make a small commission, at no extra cost to you. This money helps with the running costs of my website. Thank you for supporting Sugar Free Londoner.