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spoon lifting a spoonful of fluffy vanilla cake from a mug

Keto Vanilla Mug Cake

Katrin Nürnberger from sugarfreelondoner.com
This keto vanilla mug cake is one of my favourite easy treats. It is like a single serve vanilla pound cake. Perfect for a spontaneous sugar free dessert straight out of the mug - or turn it out onto a plate!
Course Dessert
Cuisine British
Prep Time 3 minutes
Cook Time 1 minute
Total Time 4 minutes
Servings 1
Calories 266kcal


  • Microwave



  • 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.



2.5g net carbs per serving. Makes 1 serving. 
My microwave operates at 900W and my cake took 80 seconds to cook. Here's a quick overview of recommended baking times for this cake recipe: 
  • 600W = low power. 100 seconds. 
  • 800W = 90 seconds.
  • 900W = 80 seconds. 
  • 1000W = 70 seconds. 
After these times, check whether the cake is done. If it's still undercooked, add increments of 10 seconds. 
Choose a cup or ramekin that holds a minimum of 200ml. Otherwise the dough will overflow as it rises. 


Calories: 266kcal | Total Carbohydrates: 5.1g | Protein: 9.6g | Fat: 23.2g | Saturated Fat: 10.1g | Fiber: 2.6g | Sugar: 1.3g