sometimes milk

Milk is a nutrient-dense liquid secreted by mammary glands of lactating mammals, most commonly obtained from domesticated cattle (Bos taurus), though also produced by goats, sheep, buffalo, and other species. Cow's milk comprises approximately 87% water, with the remaining 13% consisting of lactose (milk sugar), proteins (casein and whey), fats, and minerals. The flavor profile is naturally sweet with subtle fatty and creamy notes, though this varies by breed, diet, and processing method. Whole milk contains roughly 3.5-4% fat, while low-fat and skim varieties have fat content reduced through centrifugation.

Milk serves as the foundation for numerous dairy products through fermentation, coagulation, and concentration processes. Regional variations in milk composition and production methods result in distinct flavor profiles: Jersey and Guernsey cattle produce richer milk with higher fat content, while Holstein cattle yield higher volume with slightly lower fat percentage.

Milk functions as a fundamental ingredient across global cuisines, serving as a base for sauces (béchamel, mornay), custards, puddings, and baked goods. It is essential in both sweet preparations (ice cream, panna cotta, crème brûlée) and savory dishes (cream soups, risotto, mac and cheese). In Indian cuisine, milk is heated to concentrate its richness in kheer and condensed milk preparations. Milk is also fermented into yogurt, kefir, and other cultured products, or coagulated with rennet to produce cheese. The choice between whole, low-fat, and skim milk affects richness and texture in final preparations, with whole milk preferred for custards and sauces requiring body.