Thumbs up for more mug cake recipes :) This DIY lemon mug cake is super duper easy to make and takes less than 5 minutes to make! RECIPE: Lemon Mug Cake 3 Tbsp Flour 1/4 tsp baking powder 3 Tbsp sugar 2 Tbsp vegetable oil 1 egg 2 tsp lemon juice (Icin