NEW YORK — July is National Ice Cream month in the United States, where the average American eats about 20 pounds of the frozen treat annually. Ice cream has come a long way since Alexander the Great reportedly enjoyed eating snow and ice flavored with honey and nectar. More than 1,000 flavors of ice cream can be had today, from staples such as vanilla and chocolate to decidedly non-traditional and aggressively palate-challenging flavors such as garlic and pizza.