In medium bowl, combine coffee beverage, sugar and boiling water; stir with wire whisk until sugar is dissolved. Stir in cold water. Pour mixture into ungreased 13x9-inch (3-quart) glass baking dish. Freeze about 1 hour or until icy around edges.
Stir and mash mixture with fork to break up ice crystals. Freeze an additional 1 1/2 to 2 1/2 hours, breaking up mixture with fork every 30 minutes. Serve immediately or let stand at room temperature 5 to 15 minutes before serving. To serve, stir with fork; spoon into dessert dishes.