In a large bowl combine all of the ingredients and whisk until the cornstarch has dissolved. \tTransfer the mixture to a medium saucepan set over medium heat. Cook whisking constantly until the mixture starts to form a thick stretchy paste, about 4 minutes. \tWhile warm, roll tablespoon-sized balls of the paste into small milk balls. \tPlate the finished milk balls on a serving dish and dust with cocoa powder for garnish. Enjoy!