
This keto vanilla mug cake is good. I mean, really good. I tested more than fair share of mug cakes in creating a recipe that I thought was good enough.
A simple keto dessert recipe that is ready in just a few minutes. So, it’s one of those recipes most of you will love. Bonus points for the fact that it also a single serve.
Keto Vanilla Mug Cake Ingredients
Here is all you need to make this keto mug cake recipe. You will need a neutral-tasting oil, collagen powder, coconut flour, egg, sour cream, baking powder and vanilla extract.

How to Make It
If you haven’t made any keto mug cake recipes beforehand, you are going to love this. To make it all you need to do is place all the ingredients into a large mug or a 10cm x 7cm ramekin and mix until combined.
Place the vanilla mug cake into the microwave and cook 90-120 seconds. Tada! That is it. Our keto vanilla mug cake is so hard, right?
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Now I have added an optional scoop of our delicious keto lemon curd to the mug cake recipe. It tastes so good together with just a few berries as well.
💡 Fun Ways to Serve a Keto Mug Cake
- Piped Whipped Ganache – Cool the mug cake slightly, then top with a swirl of whipped chocolate ganache. Pure heaven.
- Sundae Style – Add sugar-free ice cream, ganache or chocolate sauce, and crushed nuts for a mug cake sundae.
- Berry Shortcake – Top with whipped cream and a spoonful of keto berry jam or fresh berries.
- Mini Trifle – Layer chunks of mug cake with whipped ganache, berries, and a sprinkle of crushed nuts in a ramekin.
- Tropical Twist – Add coconut cream, lime zest, and toasted coconut flakes for a fresh, zesty finish.
Tip: Let your mug cake cool before topping to keep whipped ganache from melting too fast!
Frequently Asked Questions



Keto Vanilla Mug Cake
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Ingredients
- 1 tbsp light tasting olive oil See Note 1
- 2 tbsp collagen
- 1 tbsp coconut flour or 3 tbsp almond meal
- 1/4 tsp vanilla extract
- 1/2 tsp baking powder See Note 4
- 1 egg
- 1 tbsp sour cream See Note 3
OPTIONAL
- 1-2 tsp sweetener If you are not using a flavoured collagen you may want to add a little sweetener to the cake batter
- 1 tbsp Sugar Free Lemon Curd Click for recipe
Instructions
CONVENTIONAL METHOD
- Place all ingredients into a mug or ramekin. Mix to combine.
- Microwave on high for 90-120 seconds.
- Serve as is or with cream or buttercream.
THERMAL METHOD
- Place all ingredients into mixer. Mix 10 sec/speed 5. Spoon into mug or ramekin
- Microwave on high for 90-120 seconds. Serve as is or with cream or buttercream.
Notes
- Any neutral oil can be used in place of light taste olive oil.
- Sour cream can be substituted with keto milk, cream or yoghurt. Use coconut milk, cream or yoghurt for a paleo mug cake.
- I always use aluminium gluten free baking powder.
Your Own Notes
Nutrition
60 responses to “Keto Vanilla Mug Cake So Light and Fluffy”
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Delicious -
Wow!! This recipe is stellar. I’ve shied ร way from mug cakes for so long because I’m often disappointed. But this was so fabulous.
First I cut up 3-4 strawberries and added them to the batter before microwaving. When the cake was done I topped it with a bit of cream and it was a delight!
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I would like to try this recipe but I don’t have any collagen.
I only have different flavors of True Whey protein powders and a natural Soy Protein isolate.
Is there any substitute for it?
Thank you.-
It might turn out a little heavier Hana, but worth a try. Some protein powders have different additives so it is hard to say.
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I often find other mug cakes dry โฆbut I cooked this one a little less in microwave
and swapped collagen with WPI (salted caramel)
Added 1 t natvia salted caramel sauce to mixture
and served with salted caramel sauce and cream ๐คค-
So good to hear you sorted it out. Just an FYI that WPI is much drier in baking too than collagen x
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So quick and easy!! I tipped some frozen mixed berries in to the bottom of two microwave cups and split the mixture to make two very decent size mug cakes and topped with cream! I added lime zest and half the juice of a lime with almond meal as a sub for collagen. I was worried about the coconut flour, but could not tell! Delicious and moist!-
I love this cake mixture. It is so versatile and you are absolutely right regarding the coconut flour flavour.
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๐ another winner -
This is such an easy delicious recipe -
Love this. Perfect for a quick treat -
Megan adore everyone of your recipes. This one looks amazing. Will give it ago this weekend -
This is loved here, quick, easy dessert in a hurry. Love it. -
This sounds so good!-
Quick and easy dessert. Have a go you won’t be disappointed. I served it with sugar free jam and cream ๐
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Yum, must try this tomorrow. -
Will be trying -
Great recipe
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Looks delicious-
Thanks Liz
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Fabulous recipe
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Thanks for the love Kate x
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Easy and delicious! Another winner-
Awww thanks Paul
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