A classic fun dessert found often in Brazil, that the kids will love making.
In a medium saucepan over medium heat, combine cocoa, butter and condensed milk.
Cook, stirring, until thickened, about 10 minutes.
Remove from heat and let rest until cool enough to handle.
Form into small balls and coat with chocolate sprinkels and place into muffin cups or directly onto platter.
Eat at once or chill until serving.