In a pan over a medium flame, add half of the butter.
After the butter melts, add condensed milk.
In a small bowl or glass, dissolve cocoa powder in 1/2 cup of water. (This will help it dissolve into the milk.)
Add the cocoa-water to the pan and stir for 15–20 minutes, until the mixture thickens. Check the thickness with your spoon. When you drag your spoon through the middle of the pan, the mixture should stay separated for a moment before coming back together.
Once thick, spread the chocolate mixture (we’ll call this the “dough”) onto a small cookie sheet or plate.
Place in the fridge to cool for about 20 minutes.
Once chilled, use a spoon to scoop up small amounts of the dough into your hands and form balls. Don’t handle them too much or your body heat will make the dough stick.
Roll the balls in the sprinkles and/or the coconut and set them in mini cupcake papers to chill in the fridge.
Chill the balls for about 15 minutes.
Now they’re ready to eat!