AMF, which stands for anhydrous milk fat, contains a minimum of 99.9% milk fat. AMF is made by removing almost all moisture and non-fat solids from pasteurized 40% milkfat cream. AMF comes in different types: Anhydrous milk fat (AMF) (> 99.9% milk fat) Anhydrous butter oil (> 99.8% milk fat) butter oil (> 99.3% milk fat) Butter ghee