This light and airy keto vanilla mug cake satisfies all urgent cake cravings! It's ready in just 4 minutes from start to finish and comes in at only 2.5g net carbs. We love it as a quick everyday low carb sugar free dessert. With its fluffy crumb it is delicious as is, but I've included lots of ideas how to jazz it up in the post! Gluten free and low carb.
Baking proper cakes is lots of fun - if you have the time and energy for it. But some days I really just want to eat one portion of cake - quick. I don't want to turn on the oven, I don't want complicated prep, and I don't want 11 more slices tempting me over the next few days.
That's where mug cakes come in! This vanilla keto mug cake is so easy to make and just hits the spot. I love that you can stir it together with a fork. And that it cooks in just 80 seconds. It's an almost instant dessert!
Ingredients
Here's what you need to make this easy low carb mug cake:
- Almond flour - I'm using what we here in the UK call ground almonds. This is equivalent to regular almond flour in the US. Ground almond are coarser than super fine almond flour. If you want to use super-fine, reduce the amount to 1 ½ tbsp.
- Coconut flour - The mix of coconut and almond flour works really well in low carb recipes.
- Butter - You could replace this with coconut oil for a dairy free version.
- Egg - Use a medium egg if you can. I did try making this recipe with a large egg and found it a bit eggy.
- Sweetener - I used a granulated erythritol monk fruit blend that's a 1:1 sugar alternative. Allulose and xylitol would work as well. 1 tbsp was just right for me, but if you prefer a sweeter cake add more.
- Baking powder and vanilla extract.
Best container for mug cakes
I've had my fair share of microwave mug cake accidents! If your mug, ramekin or dessert bowl is too small, the batter will overflow as it rises and make a mighty mess.
It's important that your vessel has a volume of at least 200 ml and is wider rather than narrow and tall. Mugs or ramekins should not be filled with batter more than half. Always, always have a few fingers of free space between the batter and the rim.
How to make keto vanilla mug cake
Stir together the dry ingredients in a bowl - almond flour, coconut flour, baking powder, sweetener. Take care to break up any lumps.
In a second bowl, whisk the egg using a fork. Then add the melted and cooled butter plus the vanilla extract and whisk until combined.
Add the dry ingredients to the wet and stir until a smooth batter forms.
Grease a mug or ramekin with butter and fill in the batter. Microwave for 80 seconds @ 900W.
Enjoy straight from the mug or invert onto a plate. I served it with a dollop of sugar free whipped cream.
Baking times for different power levels
My microwave operates at 900 watts and my cake took 80 seconds to cook. Here's a quick overview of recommended baking times for this low carb vanilla mug cake recipe:
- 600W = low power. 100 seconds.
- 800W = 90 seconds.
- 900W = 80 seconds.
- 1000W = 70 seconds.
Check the cake 10 seconds before it's finished and see how it's getting on. If it's still undercooked, add increments of 10 seconds. Just keep in mind that cakes continue to cook in the hot cup after you take them out. So don't be tempted to overcook!
Oven Instructions
To make this recipe in the oven, bake at 180 C / 350F for 12-15 minutes.
Low carb mug cake variations
Here is how you could jazz up this keto mug cake:
- Stir berries into the batter - blueberries, raspberries or chopped strawberries
- Add sugar free chocolate chips or chipped 90% chocolate
- Turn it into a Victoria sponge cake! Turn it out onto a plate, slice in half and add sugar free strawberry jam and whipping cream
- Add a simple keto cream cheese frosting - 2 tbsp cream cheese mixed with a splash of vanilla extract and 1 tsp powdered sweetener
- Slather it with Vegan Keto Caramel Sauce!
More keto mug cake recipes
Love quick & easy sugar free cakes? Me too! See my other mug cake recipes below. Simply click on the image titles to go straight to the post.
Triple Chocolate Mug Cake - A deliciously moist keto chocolate mug cake studded with sugar free chocolate chips and topped with a creamy chocolate sauce.
Keto Peanut Butter Mug Cake - Sometimes only a moist, fluffy chocolate peanut butter mug cake will do! This is a super popular recipe.
Microwave Mug Cheesecake - The perfect sugar free dessert if you crave cheesecake but don't want to make a large cake.
Sugar Free Lemon Mug Cake - Big flavour, light texture and with a deliciously zingy lemon glaze.
Tried this recipe? Give it a star rating below!
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Keto Vanilla Mug Cake
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Equipment
- Microwave
Ingredients
- 2 tbsp almond flour use only 1 ½ if super-fine
- 1 tbsp coconut flour
- 1 tbsp butter melted
- 1 egg medium, room temperature
- 1 tbsp granulated sweetener (So Nourished)
- 1 tsp vanilla extract
- ¼ tsp baking powder
Instructions
- Stir together the dry ingredients in a bowl - almond flour, coconut flour, baking powder, sweetener. Take care to break up any lumps.
- In a second bowl, whisk the egg using a fork. Then add the melted and cooled butter plus the vanilla extract and whisk until combined.
- Add the dry ingredients to the wet and stir until a smooth batter forms.
- Grease a mug or ramekin with butter and fill in the batter. Microwave for 80 seconds @ 900W. (Baking times for different power levels are included in the notes below).
- Enjoy straight from the mug or invert onto a plate.
Video
Notes
- 600W = low power. 100 seconds.
- 800W = 90 seconds.
- 900W = 80 seconds.
- 1000W = 70 seconds.
Nutrition
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Penney Cabrera says
I have tried a ton of Low Carb/Keto Mug Cake and this is by miles better than all the rest. I used a large egg and didn't find it eggy at all. Loved this!!
Katrin Nürnberger says
So glad you enjoyed it!
Bethany says
Amazing my cake! I love how simple it is. I did not think it was it was eggy at all.
Lynn Leslie says
I liked this mug cake. Because of the eggy taste, it needs a cinnamon-Stevia topping. I would call it a Breakfast Cupcake.
Katrin Nürnberger says
Hi Lynn, I did not think this mug cake tasted eggy. However, you can definitely add cinnamon for a stronger flavour. Or simply leave out the egg yolk and only use the white. The egg taste is all in the yolk!
M says
Hi, do you mean leave out the egg yolk and add egg white only? I love your recipes by the way!
Katrin Nürnberger says
Yes, corrected! Thanks 🙂
jo says
My fav mug is calling out for this!