Gelato, which is Italian ice cream, is made from milk, sugar, and other flavorings. American ice cream is typically made from cream, rather than milk. Thus, American-style ice cream is about 10-18% butterfat, while Italian gelato is 4-8% butterfat. The gelato ingredients, which may or may not be pasteurized, are cooled as they are being mixed together. Due to the nature of the mixing, gelato typically has less than 35% air. In contract, American ice cream is often 55% air or higher. Therefore, gelato is much more dense and flavorful.

Gelato is traditionally made with fresh fruit, milk, and sugar. Other ingredients, such as chocolate, nuts, caramel, candies, cookies, and even flowers have been added. Gelato that is made with water instead of milk is called sorbetto. Gelato is preferred in northern Italy, while sorbetto is eaten in the hotter climates of southern Italy and Sicily.

For both home and commercial gelato production, one may make all ingredients from scratch. However, it is more convenient and cost-efficient to buy prepared gelato ingredients. Fruit, nut, flavor, and chocolate ingredients are available as ready-to-use pastes. There are gelato and sorbetto bases too. Commercial gelato ingredients may even contain milk and sugar substitutes, such as soy milk or aspartame.