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Coconut flour mug cake – keto single birthday cake

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4.86 from 267 votes
Carine Claudepierre -

This keto coconut flour mug cake is the most delicious keto vanilla mug cake with only 4.9g net carb per serve. Plus, it makes a lovely single-serve keto birthday cake if you use my keto coconut frosting. Also, the recipe is gluten-free, dairy-free, and therefore suitable for anyone on a paleo diet too!

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We all crave birthday cakes at some point, whether it’s your birthday or not, that craving must be fixed right? As always I’m here to tell you that this is ok to have birthday cake on a keto diet. Of course, you need to use the right ingredients to keep things very low-carb and high-fat but keep reading and I will guide you through this in a sec!

Coconut flour mug cake – cake cravings fix in 90 seconds

Coconut flour is one of the lowest flour in carbs. Therefore it’s the perfect choice to make keto cakes or bread. It is also a high fiber flour, meaning it absorbs liquid very quickly and that is why you need to measure your flour with precision to ensure a moist keto vanilla mug cake. Let’s see what you need to make this lovely treat:

  • Coconut flour – make sure it has no lumps for best results. If so, squeeze the lumps between your fingertips before you measure the flour.
  • Egg – don’t replace with an egg-free option or it will be very crumbly and dry.
  • Unsweetened almond milk  – I always use Almond Breeze because it doesn’t contain added starch or sugar and the flavor is transparent so it doesn’t change the cake flavor. However, it does add the creaminess you expect from milk, without the dairy or carbs so it is perfect for this.
  • Coconut cream – I use canned coconut cream, always choose it with more than 30% fat per 100 g for the most delicious creamy texture. Otherwise, if you can’t find it where you live replace it by heavy cream.
  • Sugar-free crystal sweetener – I love Monk fruit stevia blend, see here, it’s the best sugar replacement on keto, no carbs, and no aftertaste.
  • Vanilla stevia drops – or vanilla essence it is up to you or coconut stevia drops if you want to make a keto coconut mug cake.
  • Baking powder

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How to bake keto mug cake?

A keto mug cake is generally baked in the microwave between 60 seconds to 90 seconds. As I divided this recipe in half, I cooked this recipe in 2 separate mugs to assemble a birthday layer cake. Consequently, I only microwaved each mug cake for 60 seconds. The reason why I decreased time is to keep the cake moist and soft. If you intend to microwave the whole batch all at once you can microwave it for 9o seconds. Of course, some of you may not have a microwave and that’s ok. You can bake mug cakes in greased ovenproof ramekins for 8-12 minutes at 180 C (350F). You know the mug cake is ready when the batter is set but still moist.

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How to make coconut keto frosting?

The best way to create a single-serve keto birthday cake with a mug cake recipe is to bake 2 similar cake layers and assemble them with keto frosting. My favorite keto frosting is dairy-free, made of unsweetened coconut yogurt, unsweetened desiccated coconut, powdered erythritol, and stevia drops. Actually, pure coconut yogurt is the best keto yogurt you can eat! It has no sugar, no dairy meaning no lactose sugar. It’s made of 100% coconut cream and probiotic that is all. I recommend you check the ingredients list of your yogurt before buying as some brands add starch or sugar!

More keto mug cakes recipe

I love low carb mug cakes for breakfast or as a quick sweet craving fix in the afternoon. I created a range of delicious keto mug cakes for you to try. Also, if you don’t like coconut flour you can try my almond flour mug cake recipe instead

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A 90-second almond flour mug cake with a delicious vanilla flavor
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As always, if you make this recipe share a picture of your creation with me on Instagram! You know how much I am in love with your recipe pics.

XOXO Carine


Recipe Card

KETO COCONUT FLOUR MUG CAKE easy, low carb, healthy a keto vanilla mug cake with coconut frosting 4.9g net carbs #ketomugcake #keto #coconutflourmugcake #coconutflour #ketorecipes #easy #healthy #lowcarb #paleo #coconut #vanilla #birthday #microwave #videos #90second

Coconut flour mug cake

Coconut flour mug cake is an easy 90-second keto vanilla mug cake recipe to create a delicious single birthday cake!
Prep Time: 1 min
Cook Time: 1 min

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Net Carbs
Author: Carine Claudepierre
1 serve
4.86 from 267 votes
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Frosting ingredients

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  • Grease 2 microwave-proof ramekins or mugs with coconut oil or butter. Set aside.
  • In a small mixing bowl, add all the mug cake ingredients (except frosting ingredients!). Follow the order listed above, liquid first, dry ingredients at the end. Make sure your egg, almond milk, and cream are all at room temperature to avoid lumps with coconut flour.
  • Whisk all the ingredients together until no more lumps and a consistent cake batter form.
  • Divide the batter evenly into the 2 microwave-proof ramekins or mugs.
  • Microwave each mug separately, on high power for 60 seconds. If you want to microwave the whole batter in one mug, extend the baking time to 90 seconds.

Coconut frosting

  • Whisk the frosting ingredients all together. Set aside in the fridge while the cake layers reach room temperature.

Assemble the keto birthday cake

  • Unmold carefully both mug cake layers and cool down on a rack. You can place them in the fridge for 10 minutes to accelerate the process.
  • Place one cake layer on a plate, spread half of the coconut frosting on the cake, place the other cake layer on top, and add more frosting. Spread evenly and sprinkle extra unsweetened coconut flakes on top before serving if desired.

How to bake my mug cake in the oven?

  • Preheat oven to 180°C (350°F).
  • Grease 2 oven-proof ramekin with coconut oil or butter.
  • Fill each ramekin with half of the batter and bake for 8-12 minutes or until cake is moist and cooked in the center. Don't overbake or the cakes are getting very dry in the middle.
  • Cool-down before frosting as mentioned above.


  • You can make the batter the day before, store in an airtight container in the fridge and bake the next day. Don't store a microwaved-baked mug cake for more than 2 hours. They get dry and lose all their texture and flavor. If you use the oven, you can store the cake for 3 days in the fridge.
Coconut yogurt, always choose one made with only 2 ingredients, coconut cream + probiotics. Some brands are not keto as they add starch or sugar. Don't use those! Otherwise, replace by cream cheese if you can't find coconut yogurt where you live.
Frosting carbs - the nutrition panel is for 1 mug cake without frosting. If you add the frosting, you'd be
Calorie: 325 kcal | Fat: 25.6 g| Net Carbs: 6.5 g (carbs: 12g takeaway fiber : 5.5 g) | Protein: 11.1 g
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Nutrition Facts
Coconut flour mug cake
Amount Per Serving (1 mug cake)
Calories 185 Calories from Fat 105
% Daily Value*
Fat 11.7g18%
Carbohydrates 9.9g3%
Fiber 5g21%
Sugar 3.6g4%
Protein 9.8g20%
Net Carbs 4.9g
* Percent Daily Values are based on a 2000 calorie diet.

This recipe is sponsored by Almond Breeze Made from the best California Almonds and I received a compensation to develop this recipe but note that I only recommend product I love and trust on this blog. Thank you.

Keto coconut flour mug cake

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  1. 5 stars
    This was great and I So appreciate a recipe with coconut flour instead of almond. Though I love almond flour, others are allergic so it’s wonderful you have recipes using each so we All can enjoy a keto mug cake together. Thank you!

    • You can replace stevia drops by 1 extra tablespoon of erythritol + 1 teaspoon vanilla extract or coconut extract. Enjoy, XOXO Carine

  2. 5 stars
    Thanks for this recipe! The cake came out so fluffy and delicious. My yogurt icing was a little thin but tasted great. I think I’ll also try it as a syrup for fresh fruit or pancakes. 🙂

  3. Can you tell me what size the ramekins would be. 4oz, 6oz or 8oz. ? Also I used the link to the Almond Breeze unsweetened almond milk. t\The 3rd ingredient is Tapioca Starch. Not a problem for me, but maybe for others. Still a very good choice for a milk alternative. I would like to make this cake for my daughter as a pick-me-up for those not so good days. Thank you for such a good recipe for cake in a hurry.

    • Hi ! Any mug size work well, 4 oz is the best for that time. Indeed most Almond milk add a touch of starch for texture but it doesn’t add carbs in the milk as it is such a low dose in this brand! You can replace by water if prefer or any milk you love. Enjoy the treat with your daughter. Carine.

    • Well, the prebiotic in coconut yoghurt is what brings the sourness so you may not enjoy it as much as I do. But I love local New Zealand producer like Cathedral cove or raglan. Otherwise I recommend you use pure coconut cream form a can, it won’t have aftertaste because there is no probiotic. Enjoy the recipe. XOXO Carine


The recipes, instructions, and articles on this website should not be taken or used as medical advice. You must consult with your doctor before starting on a keto or low-carb diet. The nutritional data provided on Sweetashoney is to be used as indicative only. The nutrition data is calculated using WP Recipe Maker. Net Carbs is calculated by removing the fiber and some sugar alcohols from the total Carbohydrates. As an example, a recipe with 10 grams of Carbs per 100 grams that contains 3 grams of erythritol and 5 grams of fiber will have a net carbs content of 2 grams. Some sugar alcohols are excluded because they are not metabolized. You should always calculate the nutritional data yourself instead of relying on Sweetashoney's data. Sweetashoney and its recipes and articles are not intended to cure, prevent, diagnose, or treat any disease. Sweetashoney cannot be liable for adverse reactions or any other outcome resulting from the use of recipes or advice found on the Website.

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