“I’ve heard that if you happen to add salt to eggs too far upfront, it could actually destroy their texture and toughen them up. When ought to I salt my eggs?”
I, too, have heard this story. The truth is, it was a legendary chef (who shall stay anonymous) who informed me a number of years in the past, “Do not add salt to your eggs till proper earlier than you cook dinner them, or it is going to skinny them out after which toughen them up.” With out questioning it, I dutifully adopted that recommendation ever since. (I’m, nonetheless, prepared to name out Gordon Ramsay for giving the identical recommendation. Since he is made a profession of shaming others, he completely deserves a small lashing right here.)
As we all know by now, it is not unusual for such hand-me-down kitchen knowledge to crumble below scrutiny. Would this little tidbit of cooking lore maintain up and ceaselessly vindicate Mr. Ramsay? It is a simple sufficient query to check out, so I began cracking some eggs.
Egg Fundamentals
Earlier than we get to my check, let’s assessment some egg fundamentals that will assist us perceive this higher. So, what precisely occurs after we cook dinner an egg?
To simplify, let’s concentrate on the egg whites (a.okay.a. albumin), that are largely made up of water and varied proteins. Of their regular state, these proteins are all folded up on themselves and have a tendency to keep away from one another. Consider them like a roomful of introverts who’re extra inclined to take a seat on the ground and stare at their telephones (whereas conserving a protected distance from the others) than rise up, introduce themselves, and work together. If gentle rays had been a gaggle of joggers slicing by means of the room, they’d have a simple time working round and thru these evenly-spaced individuals. That is why uncooked egg whites are clear: gentle has little hassle slicing a path by means of minimal obstacles like free-floating, scrunched-up proteins.
However there are methods to alter the habits of our uncommunicative proteins. The apparent one, after all, is so as to add warmth. Warmth works on the proteins within the egg white a lot the best way a therapist would possibly encourage a gaggle to place down their telephones and get comfy with one another. Abruptly, they’re coalescing into teams, doing ice-breaking workouts like holding fingers after which attempting to untangle the human knot, and even working their method as much as the top of interpersonal enjoyable: belief falls! However within the case of the proteins in albumin, as soon as that handholding and compatriot-catching enjoyable begins, it just about stays that method, nearly as if our group grew to become slightly too smitten by their newfound associates and determined to stay collectively extra completely…with an entire lot of handcuffs.
This becoming a member of of proteins is what companies up the egg and turns it opaque, since gentle cannot get previous these interconnected proteins as simply—simply think about the joggers attempting to get by means of this group of interconnected individuals. The extra warmth you add, the tighter these protein bonds get, inflicting the egg to agency up increasingly. Finally, if you happen to overcook the eggs, the bonds will get so tight that the proteins begin squeezing out the water—a phenomenon you could have observed if you happen to’ve ever hammered eggs actually laborious. (Truly, a cooked egg would not have to remain that method: It’s doable to un-cook an egg and return the strong whites to their authentic clear, fluid consistency, however I am undecided I would need to eat it after that.)
Other than warmth, there are different issues that may promote this protein linkage. One is acid, which is why some individuals say including a splash of vinegar to egg-poaching water helps set the white extra shortly. One other is salt. Based on Harold McGee’s On Meals and Cooking, when salt dissolves into egg, it separates into charged ions that change {the electrical} atmosphere sufficient to encourage coagulation. Based mostly on that, it might sound logical to conclude that eggs with salt will coagulate extra shortly, and due to this fact be extra liable to toughening.
The Check
To seek out out what really occurs if you add salt to egg, I scrambled 5 side-by-side batches. Every batch contained three eggs and 1/8 teaspoon kosher salt, with the one distinction being how lengthy every was uncovered to the salt earlier than cooking: 60 minutes, half-hour, quarter-hour, 5 minutes, and 0 minutes.
The consequence was that every one the scrambled eggs had been almost indistinguishable from one another. If something, the eggs that sat with salt for the longest had been extra moist and tender than the eggs that had been uncovered to salt for much less time, although I am unable to stress sufficient that the variations had been extremely delicate.
Whereas salt actually would not harm the eggs (and will even assist), there is no query that an important issue when cooking eggs is the cooking approach itself. Within the case of scrambled eggs, meaning utilizing light warmth and taking the eggs off the warmth slightly early to account for carryover cooking.
Nonetheless, it appeared unusual that my assessments indicated that, if something, salt can enhance the feel of the eggs, which is the precise reverse of what we would anticipate from an ingredient that promotes coagulation. I turned again to McGee for an evidence. Based on him, the explanation that the salt would not toughen the eggs is that, whereas performing as a catalyst to make proteins bond at decrease temperatures, it concurrently capabilities as a buffer, stopping the proteins from getting too shut to one another and decreasing the chance of water being squeezed out.
Principally, to return to my analogy, salt is type of like an individual who’s bought a key to unlock all these handcuffs so the individuals can return to being pleasant—however not too pleasant—with one another. I would say Gordon Ramsay may perhaps do with slightly little bit of pre-salting in his life too, if you already know what I imply.