In a medium-size pot melt the butter over medium heat. As soon as the butter is melted add the condensed milk. Don’t let the butter brown or it will add a weird flavor. Then add the cocoa powder and stir until it boils and you can see the bottom of the pan when stirring.

Take out of the stove and let it chill. Cover with plastic wrap and make sure it touches the mix. Take to the fridge for 3 hours.

Cover your hands with butter and make balls with the mix. Cover this balls either with rainbow sprinkles or with granulated chocolate. Take to the fridge for 1 hour. Serve.