So, you put the dry ingredients in the mug first (a big mug) and mix it up. Then add the wet and mix it up and then add the chocolate chips if you're adding them. I recommend adding them though unless you have icing as well because the cake could be a little dry without them. After that you just pop it in the microwave on high for 3 minutes and you have cake. Just like that.
I couldn't even believe my eyes. Cake! In a mug!