Frozen yogurt is a dessert similar to ice cream, but lower in fat. It is typically made with yogurt made from milk, but non-dairy versions are also available. The yogurt may be sweet or sour, and may or may not contain the live bacteria cultures present in regular yogurt. Like ice cream, it can be made in nearly any flavor imaginable, and although it's often sold as soft serve, it can also be purchased in cartons.
Ice cream and frozen yogurt are made in the same way, with the ingredients mixed together and then churned at a very low temperature until they freeze. In addition to yogurt, most recipes include gelatin, some sort of sweetener, and additional flavors and colors. It's also possible to make this dessert fat free and sugar free, depending on the recipe.
While frozen yogurt was originally fairly sour, with Dannon producing one of the first commercial products in the 1970s, the dessert became sweeter through the years. Shops that offered it in soft serve form, often in a rotating variety of flavors with an offering of wet and dry toppings, led the trend of sweeter yogurts. The dessert became popular throughout the 1980s and 1990s as a lowfat alternative to ice cream.
In recent years, sour frozen yogurt has seen somewhat of a resurgence. Some companies have gained success by offering sour, fat-free yogurt topped with fresh fruit.
Frozen yogurt is easy to make at home with an ice cream maker, and chefs can make it sour or sweet to suit their taste. Many people who make it at home experiment with different favorite flavor combinations. Yogurt is slower both to freeze and to melt than cream, so the mixing time will be a bit longer than for ice cream. Some ice cream makers include a frozen yogurt recipe or two in their recipe books, and many recipes — from the standard chocolate and vanilla to unusual creations like lemon-ginger and vanilla-lime — can be found online.