Chocolate mug cake

Found a favorite chocolate mug cake recipe in a cartoon, and putting it here for safekeeping,. Only works for very small quantities (have not tried large quantities)

Wet ingredients:

Butter/oil: 3 tablespoon

Sugar: 4 tablespoon

Egg: One

Water/milk: 3 tablespoon

Vanilla: splash

Dry ingredients: 

Flour: 4 tablespoon

Cocoa: 2 tablespoon

Add:

One Small dairy milk in small pieces

And/ or crushed walnuts

Combine wet and dry Ingredients

Microwave for 2:30-3 minutes

Or bake for 25 minutes