Italian ice

Italian ice is a semi-frozen sweetened treat composed of finely granulated ice and fruit concentrates, juices, or purées, or other natural or artificial food flavorings. Italian ice is derived from Italian granita and is in many ways similar to sorbet and snow cones, but differs from American-style sherbet in that it does not contain dairy or egg ingredients. The ingredients in Italian ice are mixed, then whipped during the freezing process similar to the process for making ice cream. As a group, Italian ice comes in a variety of consistencies from crunchy, to smooth, to slushy. In Philadelphia and the Delaware Valley (or the Philadelphia metropolitan area), including South Jersey and northern Delaware, Italian ice is known as water ice.

Italian ice was introduced to the United States by poor Italian immigrants and is derived from the Sicilian granita, a similar and related Italian dessert, with Italian immigrants often selling this treat in the streets of cities such as New York City and Philadelphia and thus popularizing the treat in these cities. Traditionally lemon flavored, popular modern choices include cherry, strawberry, and other fruits and confections.

History
The Italian word sorbetto and English sherbet come from fruit syrups sweetened with honey or palm sugar that the Arabs used to drink diluted with water.

In Italy, Italian ice or granita seems to have appeared at the same time as ice cream in the second half of the 17th century. Both products use the same technology. Italian ice can be used as a stand-alone refreshment, dessert, or as a palate restorer in a multi-course meal.

Italian ice or granita was introduced to the United States with the arrival of poor Italian immigrants from Southern Italy. These immigrants and their descendants began selling granita in Italian neighborhoods and in the streets of American cities, resulting in the related but slightly different Italian-American dessert now known as “Italian ice” (or “water ice” in the Philadelphia area).

Water ice
Finely granulated flavored ice of Italian immigrant origin is instead commonly referred to and sold as water ice by residents and natives of Philadelphia and the Philadelphia metropolitan area, including South Jersey. Water ice is almost identical to Italian ice, as it is similarly derived from granita brought to the Philadelphia area by Italian immigrants in 20th century.

Though largely synonymous with Italian ice, water ice has also been described as a specific type of Italian ice originating in Philadelphia, or a "variation on the more broadly-accepted Italian ice."

Water ice is generally sold in Philadelphia and the Philadelphia metropolitan area in the late spring and summer months, being one of the most popular iconic frozen desserts sold in the city by virtue of commercial chains such as Rita's Water Ice.