In medium saucepan, bring water, brown sugar, cinnamon, ginger and allspice to a boil. Reduce heat to low and simmer uncovered 4 minutes. Remove from heat. Add Lipton® Green Tea Bags and brew 5 minutes. Remove Tea Bags and squeeze. Gradually blend in milk and corn syrup. Pour into metal bowl; cover and refrigerate until well chilled, about 1 hour. Process in ice cream machine according to manufacturer's directions.