Place the chocolate spread into the mug. If you're lazy and don't want to weigh 80g then go for 5 tablespoons and a little dash more.

Crack the egg in. Mix it well.

Add the flour. Mix this round until everything has been mixed together well. This only takes a few seconds of effort and makes sure that your 3 ingredient mug cake cooks correctly.

Place in the microwave for 50-60 seconds. My microwave is 750w and I find that 60 seconds is perfect when using a slightly smaller mug. With this mug I needed 70 seconds. However, err on the side of caution. Watch the microwave and do not let the cake overflow. If the cake goes to overflow then turn the microwave off immediately.

That's it! Serve it alone, with ice cream, dust it with icing sugar, whatever. It's a tasty way to have a nice treat after dinner, without breaking the bank. It IS high in calories, because of the chocolate spread and flour, but it tastes delicious so enjoy!