Salt draws water out of food
Salt dissolves on the surface and draws water out of food by osmosis, because water moves toward the saltier side. With less free water, flavor concentrates and spoilage microbes struggle. Real dry-curing follows tested recipes with exact salt ratios.
Curing takes days to months
After salting, water leaves the surface first and salt creeps inward over days or weeks. The piece firms and its flavor deepens. Gravlax takes a day or two, and prosciutto takes months. For gravlax, use salmon that was frozen first or is sold for eating raw, since curing does not kill parasites.
Test yourself
Questions from the interactive lesson, with the answer and the why.
You salt eggplant slices and ten minutes later tiny beads of liquid sit on top. Where did they come from?
Salt drew water out of the eggplant cells. Water moves toward the saltier side, so it leaves the cells.
True or false: Salting a food for a long time draws out water and concentrates its flavor.
True. Salt pulls water out, and losing water packs flavor into a smaller space.
What went wrong? You pack salmon in a salt and sugar rub and leave it on the counter for two days.
Fish cured this way has to stay refrigerated. Salt slows microbes but doesn't stop them. Keep curing fish at or below 4°C (40°F).
Fill the blank: Salt pulls water out of food by ___.
Salt pulls water out of food by osmosis. Water moves toward the saltier side across cell walls.
Why does a salt-dried ham taste so intense next to a fresh one?
Water left and months of aging built new flavors. Less water packs flavor denser, and during the long cure the meat's own enzymes break protein into savory compounds.