Unsalted butter is a type of butter that does not contain added salt. It is made from cream that is churned until it thickens and separates into butter and buttermilk. Unsalted butter is often preferred in baking and cooking because it allows for better control over the flavor and salt content of the final dish. This butter is commonly used in recipes where precise measurements are important, such as in pastries and sauces. Many chefs and home cooks choose unsalted butter to ensure that they can adjust the seasoning to their liking, making it a versatile ingredient in the kitchen.