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?
Whisk the Aquafaba until frothy in a small bowl about one minute. Add the vanilla, Guinness, salt and brown sugar and stir until combined.
Stir the flour, cocoa powder and baking powder together in a small cup and add to the liquids. Stir until combined.
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.
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.