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Butterfat or milkfat is the fatty portion of milk. Milk and cream are often sold according to the amount of butterfat they contain.

The fatty acids of butterfat are typically composed as follows (by mass fraction):

As shown above, the composition of fats in milk is usually discussed in terms of the fatty acids. Fatty acids do not occur as such in milk (and rarely in any food). Instead, they are incorporated into compounds called triglycerides.

In the U.S., there are federal standards for butterfat content of dairy products. Many other countries also have standards for minimum fat levels in dairy products. Commercial products generally contain the minimum legal amount of fat with any excess being removed to make cream, a valuable commodity.



  • Milks
    • Skim milk contains less than 0.5% fat, typically 0.1%
    • Lowfat milk contains between 0.5–2% fat; 1% and 2% varieties are widely marketed
    • Whole milk contains at least 3.25% fat
  • Cheeses
    • Dry curd and nonfat cottage cheese contain less than 0.5% fat
    • Lowfat cottage cheese contains 0.5–2% fat
    • Cottage cheese contains at least 4% fat
    • Swiss cheese contains at least 43% fat relative to the total solids
    • Cheddar cheese contains at least 50% fat relative to the total solids
  • Frozen desserts
    • sherbet contains 1–2% fat
    • Lowfat ice cream, also called ice milk, contains no more than 2.6% fat
    • Ice cream contains at least 10% fat
    • Frozen custard, like ice cream, contains at least 10% fat, but it also must contain at least 1.4% egg yolk solids
  • Creams
  • Butter (including whipped butter) contains at least 80% fat
  • Skim milk contains less than 0.5% fat, typically 0.1%
  • Lowfat milk contains between 0.5–2% fat; 1% and 2% varieties are widely marketed
  • Whole milk contains at least 3.25% fat
  • Dry curd and nonfat cottage cheese contain less than 0.5% fat
  • Lowfat cottage cheese contains 0.5–2% fat
  • Cottage cheese contains at least 4% fat
  • Swiss cheese contains at least 43% fat relative to the total solids
  • Cheddar cheese contains at least 50% fat relative to the total solids
  • sherbet contains 1–2% fat
  • Lowfat ice cream, also called ice milk, contains no more than 2.6% fat
  • Ice cream contains at least 10% fat
  • Frozen custard, like ice cream, contains at least 10% fat, but it also must contain at least 1.4% egg yolk solids
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piglix posted in Food & drink by Galactic Guru
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