Butterfat is the natural fat found in milk and cream. When you see a cream layer forming at the top of fresh milk, or notice how butter feels rich and smooth, you're experiencing butterfat. It's what gives dairy products their creamy texture and rich flavor.

The amount of butterfat determines whether milk is labeled whole, reduced-fat, or skim. Whole milk contains about 3-4% butterfat, while heavy cream can be 36% butterfat or more. When you churn cream to make butter, you're essentially separating the butterfat from the liquid. Ice cream makers carefully control butterfat levels because it affects both taste and texture: premium ice creams often have higher butterfat content, making them creamier and more satisfying.

Butterfat melts at body temperature, which is why butter melts so easily in your mouth and why it's prized in cooking and baking. Chefs value butterfat because it carries flavors beautifully and creates smooth, luxurious textures in sauces and pastries.