Preheat the oven to 180 degrees Celsius.
Line baking trays with baking paper and set aside.
Add the sugar and margarine to a bowl and mix together until creamy.
Work in the flour and cocoa until mixed together. If the batter looks a bit too dry - add a splash of milk until combined and you have a sticky cookie batter,
Roll teaspoon fulls of the mixture into balls and place on the tray.
Lightly squish them with a fork - just to leave a print on them.
Bake for 10 min.
Enjoy with a glass of milk :)