5 Minute Personal Chocolate Coffee Mug Cake

My friend JoAnn turned me on to this cake some years ago. In all that time I haven't changed a thing. Prep and bake a personal chocolate cake in minutes in your microwave.

 Ingredients
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 (microwave safe) coffee or soup mug
Prepare
Add dry ingredients to mug, and mix well.
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.
Bake
Place mug in microwave and cook for 3 minutes
The cake will rise above the top of the mug.
Allow to cool for a moment.
Tip onto plate if you wish.
Leave as is or top with powdered sugar or whipped cream.
Serve.