and no visible lumps of flour remain. Grate in fresh lemon zest according to taste and give the batter one final stir.
Place the mug in the microwave and cook at full power for approximately 2 minutes.
Since microwave wattage varies, watch the cake closely toward the end and stop cooking once it has risen and the center is set.
Let the lemon yogurt mug cake cool briefly, then finish it with a light dusting of powdered sugar.
For the hazelnut mug cake, crack the egg into another large microwave-safe
