Add 4 tablespoons flour to a mug
Add 2 tablespoons sugar
Add 2 tablespoons cocoa powder if making chocolate mug cake
Add 1/4 teaspoon baking powder
Add a pinch of salt
Add 3 tablespoons milk
Add 2 tablespoons oil or melted butter
Add 1/4 teaspoon vanilla extract
Mix until smooth
Microwave for 60 to 90 seconds
Check if the cake is set in the center
Let it cool for 1 minute
Eat directly from the mug