Chocolate Cake in a Mug

I got this recipe in an email, and didn't believe it would work.  But, of course, it was chocolate and I decided to try it!  The first time I made it, I was not all that impressed.  I tweaked it a bit and it is much better now!  It is really rich though and what I add to it make it more so.  But, my husband and I split it and it is a great treat for when you want something chocolatey fast!

5 MINUTE CHOCOLATE MUG CAKE 4 tablespoons flour 4 tablespoons sugar 2 tablespoons cocoa 1 egg 3 tablespoons milk 3 tablespoons oil 3 tablespoons chocolate chips (optional) A small splash of vanilla extract 1 large coffee mug (MicroSafe) -Add dry ingredients to mug, and mix well. (I got smart and just mix everything together, in the correct order, in a bowl and then pour it into the mug.  It is much easier that way!)  -Add the egg and mix thoroughly. -Pour in the milk and oil and mix well. -Add the chocolate chips (if using) and vanilla extract, and mix again. (I actually mix 2 Tbs chocolate chips and 2 Tbs Peanut Butter chips.  The peanut Butter chips make it so much better!!) -Put your mug in the microwave and cook for 3 minutes at 1000 watts. -The cake will rise over the top of the mug, but don't be alarmed! -Tip upside down on a plate. I then top with whip cream and sometimes hot fudge!