Hold the truffle ball in one hand on a candy holder or a fork and spoon the melted candy coating or white chocolate with the other hand. Tap the excess coating back into the bowl. Be sure to add the sprinkles immediately after coating each ball. The coating hardens quickly and there's no going back and adding them afterward. A trick to use if that does happen: Put a little bit (tablespoon) of melted coating in a small zip top bag and snip the end, drizzle it across the coated truffle ball, THEN, sprinkle with sprinkles. Voila!