Cheese is made from simple ingredients: milk, cultures, rennet, and salt. Milk is the primary ingredient, sourced from cows, goats, or sheep. Cultures are added to start the fermentation process, which develops the cheese’s flavor and texture. Rennet is then used to curdle the milk, separating it into curds and whey. Salt is added for flavor and as a preservative. These basic ingredients, combined with time and care, result in the wide variety of cheeses we enjoy today.