This keto chocolate mug cake is fluffy, rich and packed with chocolate flavor. It takes only a few minutes to make and uses ingredients you probably have in your kitchen right now.
After making this rather delicious lemon mug cake, I decided I needed a chocolate counterpart. Firstly, because mug cakes are my new low carb dessert passion. And secondly, because chocolate is my oldest, dearest friend.
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 teaspoon of cocoa powder there - and after five attempts this chocolatey beauty was born!
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🌟 Why You'll Love This Recipe
- Deep chocolate flavor
- Soft, moist, fluffy texture
- Easy recipe - comes together with a fork
- Quick! - Ready in under 5 minutes
- Naturally gluten-free
- Nut-free - uses coconut flour
- Sugar free and keto friendly - only 4.4g net carbs
- Optional chocolate sauce
Ingredients
Here are the ingredients you'll need for a keto mug cake with coconut flour:
- Coconut flour - Level the tablespoons of coconut flour to use the correct amount (no heaped spoonfuls). Coconut flour is very absorbent and you only need very little.
- Baking powder
- Cacao powder - or use unsweetened cocoa powder
- Powdered sweetener - I like erythritol monkfruit sweetener blends such as Lakanto. Swerve would work as a sugar substitute too, or pure erythritol, xylitol or allulose.
- Egg - medium
- Heavy cream - I use it instead of butter or coconut oil, makes the texture light and soft
- Sugar-free chocolate chips - or chop 90% chocolate such as Lindt.
- Vanilla extract - optional
Instructions
This section contains step-by-step instructions and photos that show how to make this recipe. See the recipe card for full information on ingredients and quantities
Step 1: In a mixing bowl, combine your dry ingredients - coconut flour, baking powder, cacao powder, sweetener. Make sure there are no lumps.
Step 2: Add the wet ingredients - the egg, cream and vanilla extract. Mix well.
Step 3: Stir in the chocolate chips and let the batter rest for a minute.
Step 4: Melt ½ teaspoon butter each in 2 mugs or microwave safe ramekins 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 or ramekins.
Step 5: Microwave on high for 90 seconds. Don't microwave any longer or your cakes will become dry.
Step 6: Enjoy straight out of the ramekin or wait until the cake has cooled a bit before you turn it out onto a plate.
Top Tips
Do not overfill. The batter rises as it cooks and can overflow. The container you use should be wide rather than narrow and tall. Don't fill with batter more than half. Always have a few fingers of free space between the batter and the rim.
Let it cool. If you want to turn the mug cake out onto a plate, wait until it has cooled a little so it does not fall apart. Keto cakes are fragile when hot. They firm up as they cool.
Microwave Timings
My microwave operates at 900 watts and the mug cakes baked in 90 seconds. Here is an overview of recommended baking times:
- 600W = low power. 110 seconds
- 800W = 100 seconds
- 900W = 90 seconds
- 1000W = 80 seconds
- 1200W = 60 seconds
Check the cakes 10 seconds before they are finished. If necessary, add increments of 10 seconds.
Keep in mind that cakes continue to cook in the hot cup after you take them out. So don't be tempted to overcook or they will dry out.
Recipe FAQs
Yes. The cooking time is the same.
Heat the oven to 180C / 350F electric or 160C / 320F fan assisted. Bake for 10-15 minutes. Test with a toothpick for done-ness. For a larger keto desert, try my sugar free chocolate cupcakes or the keto chocolate cake.
Make my coconut flour mug cake instead.
Variations
Almond flour mug cake: Use 3 tablespoons of extra fine almond flour instead of coconut flour. If you're using ground almonds or coarse almond flour, increase to 4 tablespoons.
Dairy-free: For a dairy-free mug cake, swap the heavy cream for coconut cream.
Add-ins
Here are a few ideas how you can change the flavor:
- Add a few raspberries or strawberries into the batter
- A handful of nuts such as pecans or walnuts
- Spoon 1 tablespoon of almond butter or peanut butter in the center of the cakes before cooking
- Make a cheesecake filling with 1 tablespoon cream cheese and 1 teaspoon powdered sweetener
Serving Suggestion
This keto chocolate mug cake recipe tastes delicious all on its own. But you can serve it with the following:
- Chocolate sauce: Slowly melt 2 tablespoons sugar-free chocolate chips and 1 tablespoon butter. Stir until liquid, then add 2-3 tablespoons cream. Let cool until it starts to thicken, then pour or spoon.
- Sugar free whipped cream
- A scoop of sugar free ice cream
Storage
Mug cakes are best eaten straight away.
Refrigerator: However, it is possible to store this cake in an airtight container in the fridge for up to 3 days.
Freezer: You can also freeze it for up to 3 months.
More Keto Mug Cake Recipes
Love chocolate mug cakes? I have two more recipes on my website - this 5 ingredient lava mug cake and a sugar-free mug brownie.
Tried this recipe? Give it a star rating below!
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Recipe
Keto Chocolate Mug Cake
from Sugar Free LondonerNote: The servings slider only changes the first amount in each line and not any subsequent amounts. Please make your own calculations where necessary.
Equipment
- 2 ramekins (3.5 inch, 6 ounce capacity)
Ingredients
- 1 ½ tablespoon coconut flour
- ½ tsp baking powder
- 2 tablespoon cacao powder or cocoa powder
- 2 tbsp powdered sweetener
- 1 egg medium
- 5 tablespoon heavy cream
- 2 tablespoon sugar free chocolate chips optional
- ¼ teaspoon vanilla extract optional
Instructions
- 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 ½ teaspoon 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 both ramekins at the same time on high for 90 seconds. 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!
Video
Notes
- 600W = low power. 110 secondsÂ
- 800W = 100 seconds
- 900W = 90 secondsÂ
- 1000W = 80 seconds
- 1200W = 60 secondsÂ
Jayme Daugherty
This is a great recipe! I actually made mine with 1 T almond meal and 1 T of the coconut flour and amazing flavor. I also substituted the cream for a blend of coconut & almond cream to be dairy free too! The sweetener I used was half monk fruit and half stevia...super tasty and fewer chemicals to contend with! Thanks for the start!
Zeenat
May I suggest you add the oven cooking option in the recipe?
It would be useful for people, like me, who do not use/have a microwave.
I only saw your recommendations regarding cooking in the oven while scrolling through the comments...
Donna J Shepherd
This will curb my chocolate addiction with little sugar - a win-win. Thanks!
Katrin
You're welcome, 🙂
Kathy
This has been our desert for the last 3 nights! Reminds me of Carnival Cruise Lines cholocate lava cake! Yummy
Katrin
Once you find a favourite, it's difficult to stop!! I know what you mean.... 🙂
Char
If I only have large eggs do I need to adjust anything in the recipe?
Katrin
That's a good question - probably not. I'd pick the smallest of the bunch and just make the recipe as is. If you feel the dough is incredibly liquid (like pancake batter) though you could add an extra pinch of coconut flour. Let the dough sit for a minute or so before you decide to do that though to give the coconut flour time to absorb liquid.
carol valerio
can it be done in the oven cause i don't have microwave what's the timing and temperature thanks.
Katrin
Hi Carol, I'd try it at 180 Celsius / 356 Fahrenheit for around 12 minutes. Test the inside to see if it's done!
MontySwiss
I made this as per the recipe and served it with mascarpone. Absolutely delicious! Thank you!
Katrin
What a great idea to have it with mascarpone! Sounds yum. I make a cinnamon flavoured mascarpone which I'll try out with this cake next time
Katrin
Hi Janine, that's interesting, now we know which amount of cocoa works. Thank you for trying the recipe - happy you're enjoying it!
Katrin
Oh, I'm happy you like the lemon cake. Regarding the amount of flour, I'd say probably 4 tbsp almond flour, maybe even a tiny more depending how coarse your flour is (an extra tsp?) because this recipe uses more dry ingredients (the cacao powder).
Katrin
Hi Britta, I'd love to hear what you think of them once you've made them!