This recipe comes from Brazil. It is easy to make and is pretty good.
3 tbsp. unsweetened cocoa 14 ounce condensed milk 1 1/2 tbsp. butter 1 tsp vanilla chocolate sprinkles On medium-ish heat cook cocoa, butter and condensed milk until thickened, about 15 minutes. Pour it in a buttered dish and let cool. Shape into balls about 1.5 inches or so. Roll in the chocolate sprinkles
It stays good for a few days in a tightly sealed container.