"Salt, ___, Acid, Heat" (Samin Nosrat cookbook) (3)
I believe the answer is:
fat
(Other definitions for fat that I've seen before include "Cooking grease" , "Naturally oily substance" , "Greasy substance" , "Overweight, stout" , "Substantial" .)
I believe the answer is:
fat
(Other definitions for fat that I've seen before include "Cooking grease" , "Naturally oily substance" , "Greasy substance" , "Overweight, stout" , "Substantial" .)