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Dark Chocolate Guinness Mug Cake, Vegan, Gluten Free

Dark Chocolate Guinness Mug Cake, Vegan

Moist, fluffy textured, dark chocolatey spoonable goodness with a bitter malty background flavor and a hidden pool of melted chocolate in the center. What more can you ask for in this five minute wonder?  

Course Dessert
Prep Time 2 minutes
Cook Time 3 minutes
Total Time 5 minutes
Servings 1 person


  • 3 tbsp Flour
  • 3 tbsp brown sugar
  • 3 tbsp unsweetened cocoa powder
  • 1/4 tsp baking powder
  • 1 pinch salt scant
  • 3 tbsp Guinness
  • 3 tbsp thick aquafaba, see my Aquafaa Tips section if you need help on reducing
  • 1/4 tsp vanilla extract
  • 1 ounce dark chocolate, I used 1 square from a bar of 85% but use what ever you have on hand even chocolate chips.


  1. Whisk the Aquafaba until frothy in a small bowl about one minute. Add the vanilla, Guinness, salt and brown sugar and stir until combined. 

  2. Stir the flour, cocoa powder and baking powder together in a small cup and add to the liquids. Stir until combined. 

  3. Spoon half the mixture into a mug and lay a square of chocolate in the center of the batter. Scoop the rest of the batter on top and smooth the top. 

    If you want your cake extra Guinness-y then sprinkle 1/4 tsp of beer over the top before placing in the microwave. 

  4. Every microwave has different power. 

    I baked mine in the centre the microwave for 2  1/2  minutes at half power and it was perfect. After 2 minutes check to see if the cake is cooked by gently pressing in the top with you finger. If it feels springy-solid it is done. The top will remain moist even after the center cooks and you will be left with a lovely brownie like glaze on the top.