Grease a plate with butter and set aside.
In a medium non-stick pan, combine the condensed milk, butter, and cocoa powder in medium heat and mix it well.
The mixture thickens after about 10-12 minutes, and once you can run your silicone spatula through the middle of it without it running back together for 2-3 seconds, it is done.
Pour the mixture onto the lightly greased plate and let it chill in the fridge for an hour.
In the meantime, prepare the candy cups and place the sprinkles in a bowl.
Once chilled, you are ready to roll the little balls. Lightly wet your hands, put a tablespoon of the chewy mixture on your hands, and roll into a small ball.
Roll it over the sprinkles.
Place the balls in the candy cups, and voila! Enjoy it!
