4 super yummy chocolaty Friday treats

What does a treat need to have to be qualified as a "super yummy chocolaty Friday treat"

It needs to be super yummy and preferably very chocolaty.
You should be able to make it with only a few simple ingredients that you usually have at home.
You should also be able to make it within 10-30 minuets. Like when you get hit by a sudden, unstoppable chocolate craving on a Friday night and you don't feel like going out to buy something.

Here are 4 super yummy and chocolatey no-fuss desserts!