Keto Coconut Mug Cake

close-up photo of a keto coconut mug cake

This easy coconut mug cake is fluffy and moist. It cooks in the microwave in less than 2 minutes.


  • 1 tbsp unsalted butter melted
  • 2 tbsp coconut flour
  • 1/4 tsp baking powder
  • 1 large egg
  • 1 tbsp granular erythritol
  • 2 tbsp milk can use coconut, almond or regular
  • 1/2 tbsp shredded unsweetened coconut


  1. In a large microwave-safe mug, add all ingredients except shredded coconut. Mix with a small whisk until batter is smooth and egg has been completely beaten in.
  2. Stir in 1 tbsp of shredded coconut.
  3. Cook cake in microwave at full power for about 1 minute 30 seconds or until cake is fully cooked. Cake will initially rise very high before sinking back down when it stops cooking.
  4. Allow cake to cool a few minutes before eating. If you want a nicer presentation, you can remove the cake from the large mug and place it into an 8 oz mug. Top with whipped cream or coconut whipped cream before serving.


  • The cake can be topped with regular whipped cream sweetened with erythritol or coconut whipped cream (replace the powdered sugar with powdered erythritol)
  • I used So Nourished erythritol sweetener granular* in the cake.
  • I used Bob Red Mill's coconut flour.*
  • I cooked my cake in an 1100 watt microwave.  You may need to adjust time and/or power if you are using a different wattage.
  • *Some of the product links contained in this post are affiliate links. Much like referral codes, this means I earn a small commission if you purchase a product I referred (at no extra charge to you).
  • The estimated nutrition carbohydrates count excludes sugar alcohols. The net carbs excludes both fiber and sugar alcohols.

Nutrition Values

Serving: 1cake

Calories: 259kcal

Carbohydrates: 11g

Protein: 9g

Fat: 20g

Saturated Fat: 13g

Cholesterol: 194mg

Sodium: 108mg

Potassium: 209mg

Fiber: 6g

Sugar: 3g

Vitamin A: 649IU

Calcium: 105mg

Iron: 1mg

Net Carbs: 5g

The nutrition information provided are only estimates based on an online nutritional calculator. I am not a certified nutritionist. Please consult a professional nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.

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Thank you to…

Keto Coconut Mug Cake - Kirbie's Cravings (