What does butterfat mean?
Butterfat is the natural fat contained in milk and other dairy products, and it is the substance from which butter is made. Chemically, it consists mainly of triglycerides and gives dairy foods much of their characteristic richness, flavor, and texture. In practice, the term functions as a measure of quality and richness: dairy farmers, regulators, and food producers speak of the butterfat content of milk, cream, cheese, and ice cream, with breeds such as Jersey and Guernsey renowned for producing especially high-butterfat milk. Because it appears chiefly in technical, agricultural, and culinary contexts rather than casual speech, butterfat carries a precise, professional connotation, yet it also evokes indulgence — the richer the butterfat, the more luxurious the product. It is treated as an uncountable mass noun, and its familiar compounds make it a useful term for anyone interested in food, farming, or nutrition.
nounThe natural fat found in milk and dairy products, from which butter is made; it is the principal component of butter and a standard measure of richness in milk and cream.
- The natural fat present in milk and dairy products, the substance from which butter is made.
"Jersey and Guernsey cows produce milk with an exceptionally high butterfat content."
"Ice-cream makers prize high butterfat for its rich texture and flavor."
"Government standards require whole milk to contain a minimum percentage of butterfat."
Rarely pluralized; the plural may appear when referring to different types or sources of milk fat.
"The study compared the butterfats of cow, goat, and sheep milk."
A single Jersey cow's milk can carry nearly twice the butterfat of ordinary supermarket milk — which is why it makes such extravagantly rich butter and ice cream.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of butterfat
Butterfat combines 'butter,' which entered English via Old English 'butere' from Latin 'butyrum' (itself borrowed from Greek 'boutyron'), with 'fat,' a native Germanic word. The compound arose in English as a straightforward descriptive formation, used in agricultural and commercial contexts to denote the fat component of milk. Its Latin and Greek ancestry links it to related terms such as 'butyric,' as in butyric acid, a compound first identified in rancid butter.
How butterfat is actually used
Butterfat is primarily a technical and agricultural term, used in dairy farming, food science, labeling regulations, and cooking contexts rather than in everyday conversation. It is an uncountable mass noun in most uses.
Easily confused with butterfat
Butterfat is the fatty portion of milk from which butter is made, whereas buttermilk is the tangy liquid left over after churning cream into butter.