5-minute chocolate mug cake

A 5-minute what?! Ever find yourself at a time when you want something sweet to eat but you don't have anything or don't want to slave away baking? Well, this recipe is the solution (though not perfectly 5 minutes... more like 10!). Basically it's a cake in a mug! Here's the recipe, and it makes two:

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What you need:
4 tbsp flour
5 tbsp white sugar (or 4, depending on how sweet you want it)
2 tbsp cocoa powder
pinch of salt
1 tsp baking powder
1 egg
3 tbsp of milk
3 tbsp of oil
splash of vanilla
2 microwave safe mugs
Optional
1/2 tsp of instant coffee
chocolate chips

Directions:
First add the flour, sugar, coffee, baking powder, and cocoa into the mugs or the bowl. If you use two mugs, make sure to halve the ingredients (saves dishes!); mix well.
Add the milk, oil, chocolate chips and vanilla extract and stir well.
Add the beaten egg. The 1 egg measures to be 3 1/2 tbsp, so put 1 3/4 in each mug.
Sprinkle with some chocolate chips and cover with a microwave proof cling film. Microwave on medium-high for 1 minute and then for another 30 seconds. It should be cooked but moist and gooey in the middle. This depends on your microwave. Be sure to watch, as it can explode!
Allow to cool and eat greedily with some cream or ice cream. Enjoy!