I just made myself a cup of chocolate cake! For those who are concerned about cup size (no, I am not talking A,B,orC) I'm talking coffee mug. I used a mug with an inside circumference of 10 inches and my cake rose to approx. 3 and 1/2 inches tall. I did do a few changes, I greased my mug with canola oil and started with the wet ingedients first so I could whip up my egg in the cup better. I didn't add the chocolate chips to the batter but sprinkled them on top when I took it out of the microwave. They made a nice gooey chocolate icing for my chocolate cake. I am eating it between typing. Yum!