纯猪油是怎么来的?猪自己长纯猪油了?很多时候,那就是板油
这里店里卖的lard,提炼方法和自己家里熬的方法是不一样的。
Lard may be
rendered by two processes: wet or dry. In wet rendering, pig fat is boiled in water or steamed at a high temperature and the lard, which is insoluble in water, is skimmed from the surface of the mixture or separated in an industrial
centrifuge. In dry rendering, the fat is exposed to high heat in a pan or oven without water (a process similar to frying bacon). The two processes yield somewhat differing products. Wet-rendered lard has a more neutral flavor, a lighter color, and a high
smoke point. Dry-rendered lard is somewhat more brown and has a caramelized flavor and has a lower smoke point.
[6][7] Rendered lard produces an unpleasant smell when mixed with oxygen.
[8]
(自己熬一般属于后者)
Industrially-produced lard, including much of the lard sold in supermarkets, is rendered from a mixture of high and low quality fat from throughout the pig.
[9] Lard is often
hydrogenated to improve its stability at room temperature. Hydrogenated lard sold to consumers typically contains fewer than 0.5 g of
transfats per 13 g serving.
[10] Lard is also often treated with bleaching and deodorizing agents,
emulsifiers, and
antioxidants such as
BHT.
[4][11] These treatments make it more consistent and prevent spoilage. (Untreated lard must be refrigerated or frozen to prevent
rancidity.)
[12][13]