Keto Vanilla Mug Cake So Light and Fluffy

The most moist and delicious Keto Vanilla Mug Cake. Ready in under 3 minutes.
Before jumping to the recipe please note that the below information contains HOT TIPS for this recipe. We try and answer all your questions to guarantee a perfect keto recipe every time.

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.

This is such a simple keto dessert recipe that is ready in just a few minutes. So, it is one of those recipes most of you will love. Bonus points for the fact it also single serve.

The 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.

keto mug cake ingredients in small bowls

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?

Now I have added an optional scoop of our very delicious keto lemon curd to the mug cake recipe. It tastes so good together with a just a few berries as well.

FAQs and Substitutes

What oil or fats are best to use? Use any neutral tasting oil like MCT or light tasting oil. Butter or ghee can be used as well.

Keto Collagen what is it and where do I get it? Keto Collagen is available form most low carb suppliers like Keto Eats Australia or direct from Aussie business Locako. (A fave of mine AND an affiliate – use the coupon MEGAN15 for 15% off at checkout). Keto collagen is good for our hair, skin, nails and joints. In fact it has a very long list of supposed health benefits.

Can I substitute the collagen for something else? Yes you can choose to use some Whey Protein Isolate or almond meal in its place.

I am not a fan of keto mug cake recipes with coconut flour what can I swap it for? The coconut flour is very absorbent in this mug cake recipe. Can use golden flaxseed meal or chia flour in its place. If using almond meal replace the coconut flour with 2-3 tbsp.

I don’t have a microwave? Yes, you can still bake a mug cake in the oven. Simply bake at 180°C for 10-12 minutes

small white pot with cake in it
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Vanilla Keto Mug Cake in a white pot surrounded by raspberries

Keto Vanilla Mug Cake

The most moist and delicious Keto Vanilla Mug Cake. Ready in under 3 minutes.
4.95 from 59 votes!
Prep Time: 1 min
Cook Time: 2 mins
Total Time: 3 mins
Course: Dessert
Cuisine: American, Australian Keto
Diet: Diabetic
Recipe Category: Low Carb
Calories: 269kcal
Author: Megan Ellam
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Servings: 1 serve
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  • 1 tbsp light tasting olive oil See Note 1
  • 2 tbsp collagen I used vanilla collagen, See Note 2
  • 1 tbsp coconut flour or 3 tbsp almond meal
  • 1/4 tsp vanilla extract omit if using flavoured collagen
  • 1/2 tsp baking powder See Note 4
  • 1 egg
  • 1 tbsp sour cream See Note 3


  • 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



  • 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.


  • 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.


  1. Any neutral oil can be used in place of light taste olive oil.
  2. I used Locako Vanilla White Chocolate Keto Collagen
  3. Sour cream can be substituted with keto milk, cream or yoghurt. Use coconut milk, cream or yoghurt for a paleo mug cake.
  4. I always use aluminium gluten free baking powder.

Your Own Notes


Serving: 1serve | Calories: 269kcal | Carbohydrates: 5g | Protein: 7g | Fat: 24g | Saturated Fat: 7g | Cholesterol: 176mg | Sodium: 97mg | Potassium: 61mg | Fiber: 2g | Sugar: 2g | Vitamin A: 387IU | Calcium: 51mg | Iron: 1mg | Magnesium: 5mg | Net Carbs: 3g
Tried this recipe?Mention @meganellam or tag #madcreations!

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