How To Make Delicious Swedish "Chocolate Balls"!

100 gram (3.6 oz) butter 2 dl (0.8 cup) sugar 3 dl (1.25 cup) oatmeal 3-4 tablespoons cocoa 1 teaspoon vanilla sugar (Swedish baking sugar), otherwise any sort of vanilla flour 2-3 tablespoons coffee (cold) Coconut sprinkles