A widely, if rarely, practiced technique.
With the bigger proteins and charcoal or wood fires, the mechanics are a little different, admittedly. The temperatures involved can be high enough to turn the salt pack into some sort of a form-fitting clay-like oven. For fish, however, high heat isn’t necessary, and the salt helps the fish to cook slowly and evenly while keeping moisture in. It’s more like a rock salt sous vide than anything.
We served ours (a red snapper and a black bass) with a beurre blanc. And to get into the controversial bit right away… we didn’t scale the fish before putting the crust on.
A salt crust does more than a paper wrapper, fusing flavors with greater intensity than folding can achieve.
It’s true, there are almost no culinary applications where scaling the fish is truly optional. But this is one of the exceptions.
If you look at the justifications offered for why fish must be scaled, most of them are pretty sound. The scales are inedible, semi-obviously, and would do harm to your mouth if you missed one. You can sometimes grill a scales-on fish, in theory, but burning the scales doesn’t exactly improve the flavor of the overall product.
But when you’re talking about a salt crust, there are a number of factors that combine to make it a viable option. The fish steams from the inside, which loosens the skin. At the same time, the skin shrinks somewhat, locking the scales together. And the scales don’t scorch because they’re protected by the salt.
The end result is that, with a cut on either side, the skin from head to tail can be lifted off in one piece, like you’re removing a door panel from a car–a method that leaves the scales and skin intact, arguably making it less likely that you’ll miss one. And since the fish has to be filleted anyway into serving portions, it’s not as if you’re asking diners to play CSI: Atlantis.
Although, now that I’ve said that, I feel like I owe you a joke. Okay, gimmie a sec.
Hey, c’mon, it wasn’t that bad.
Speaking personally, I’m of a finicky nature scaling because I have a supernatural power of finding random bones in anything I eat, especially fish. If a soft-shell crab ever grows a femur, I guarantee you that we’ll discover it when I eat a crab cake. So my personal preference would be to get a scaled fish, but the family recipe is to do otherwise.
Over at Silk Road Gourmet, the cite the earliest reference as being from the 4th century B.C., in Archestratus’ The Life of Luxury, a poem parodying earlier serious works with culinary advice given a great deal of gravitas. Archestratus was Greek but living in Sicily, and that puts him at a nexus of the right techniques and ingredients for making that dish.
Here’s the thing: the fragments of the work that still exist were the ones quoted hundreds of years later by Athenaeus, a Greek writing sometime around the early 3rd century A.D. I haven’t found the originals, but the translations sometimes use the word brine instead of salt.
None of that limits the ability to appreciate this dish in the present, or at any point in American history, for that matter. In the 1950s, you’d occasionally find recipes like this one from the May 12, 1957 edition of the Racine (Wisconsin) Sunday Bulletin:
Guests at the Saugman cabin frequently request salt-pack steak, which is so tender you could “cut it with a tennis racquet.” The salt crust keeps the flavor and juice in the steak and surprisingly enough, the steak isn’t salty. She got the recipe in Sheboygan and has only seen it since in two cook books.
Center cut sirloin
Buy a center cut sirloin at least 1-1/2 inches thick. Mix 2 cups salt and 1/2 cup water to the consistence of a plaster poultice (or a child’s mudpie). Place steak on one end of a fairly long piece of cheesecloth and rub top side with garlic and olive or salad oil.
Pat a quarter-inch layer of the salt mixture onto the exposed side of the steak. Wrap the cloth over that side of the steak and turn it over for the same treatment on the other side. Finish wrapping the cloth two or three times around the meat.
Have charcoal white-hot and place grill four or five inches above coals. Rub a piece of suet over the grill to clean it and prevent the meat-pack from sticking tightly. Place the wrapped steak on the grill and have a whisk broom and bowl of water handy to douse on coals when meat is flaming too high.
Broil about 20 minutes on each side, or for a very thick steak, 30 to 35 minutes on each side. When done, break and remove the salt rust and place steak on hot platter. Salt and pepper to taste.
To broil a whole tenderloin by the salt-pack method, trim the tenderloin and follow the same instructions. Place in live coals and broil about 10 or 12 minutes.
So why don’t you see more salt crust preparations? Mostly, it’s a massive waste of salt, which until recent history was an expensive ingredient to devote to a more intense iteration of en papillote, meaning cooked in parchment. Its historical applications were mostly to show off how rich you were. But that said, a salt crust does more than a paper wrapper, fusing flavors with greater intensity than folding can achieve.
So that said, my personal preference on the recipe below is to get the fish scaled anyway. If, like me, you’re from the midwest and you think it’s madness that anyone would want to live near the ocean, you’d probably prefer the scaled version. If you’re more like the brine-soaked side of my family that never met an ocean it didn’t prefer to a farm, you should absolutely try the scales-on version.
From Yesterdish’s recipe box.
Use a good quality fresh fish–black bass, red snapper, black cod, trout, etc. Fresh is the key.
Have your fishmonger gut and prep the fish butleave the scales on. [Note: Or ask to have them taken off, if you’re finicky like me.]
Prepare your fish by seasoning the cavity with aromatics like dill, rosemary, thyme, lemon, bay leaves, shallots, ginger, garlic, pepper. Not all–choose 2 or 3.
Depending on the size of the fish you need to prepare your salt.
Generally, 1 lb. of fish will require:
- 3 cups of salt
- 2 egg whites
- 1/4 cup of water
2 lbs. of fish will require:
- 4-1/2 cups salt
- 2 egg whites
- 1/4 cup of water
Make a sandy wet paste with salt, egg whites, and water.
Cover the fish that you have seasoned after you place it on a salt bed on a cookie sheet. You want 1/4 inch of salt crust all over–instant probe–set thermometer at 135-140 and place in preheated 400 deg. oven until done.
Rest for 10 minutes before cracking crust and serve.