Kosher Salt

Kosher salt is a coarse-grained salt with large, flat crystals that has become the default seasoning salt in professional kitchens and serious home cooking. Its name comes from its traditional use in koshering meat, where the large crystals draw blood from the surface effectively. The salt itself isn't necessarily certified kosher.

What makes kosher salt the preferred choice over table salt or sea salt is its crystal structure. The large, irregularly shaped flakes are easy to pinch, distribute evenly across food, and dissolve cleanly without the metallic aftertaste that iodized table salt can leave. For recipes that measure salt by weight rather than volume, see our guide to baker's percentages.

I switched to Diamond Crystal about five years ago after using fine sea salt for everything, and the control difference was immediate. Seasoning went from a guessing game to something I could feel in my fingers.

Why chefs prefer kosher salt

Professional cooks reach for kosher salt for practical reasons that affect every dish:

• Easy to pinch and control -- the large flakes sit between your fingers, letting you feel exactly how much you're adding. This tactile feedback is why mise en place setups almost always include a small bowl of kosher salt
• Even distribution -- flat crystals adhere to food surfaces better than fine granules, creating more uniform seasoning when searing meat or roasting vegetables
• No additives -- kosher salt contains no iodine or anti-caking agents. Iodine can impart a faintly metallic taste, especially noticeable in delicate dishes
• Forgiving -- the larger crystal size makes it harder to accidentally over-salt. A pinch of kosher salt contains less sodium than the same pinch of table salt
• Dissolves cleanly -- no chalky residue or off-flavors from additives

Kosher salt vs table salt vs sea salt

Sea salt falls between the two. Coarse sea salt works like kosher salt for cooking, while fine sea salt behaves more like table salt. Finishing salts (fleur de sel, Maldon) add texture and a mineral crunch to finished dishes but cost too much for everyday cooking.

When to use table salt instead: Baking recipes that call for salt by volume assume table salt's consistent density. Using kosher salt in baking without adjusting quantities can lead to under-seasoned results. For precise baking, a kitchen scale eliminates this problem entirely.

Diamond Crystal vs Morton: the conversion that matters

This is the most important thing to understand about kosher salt: the two dominant brands are not interchangeable by volume. They use different manufacturing processes that produce very different crystal structures.

Diamond Crystal uses a patented Alberger process that creates hollow, pyramid-shaped flakes. These flakes trap air, making the salt less dense by volume. Most professional kitchens and cookbook authors default to Diamond Crystal.

Morton uses a rolled process that creates flat, compact flakes. These pack more tightly, making Morton roughly 1.5-1.6x saltier than Diamond Crystal by volume.

How to convert between brands

• Recipe says Diamond Crystal, you have Morton: use about 2/3 the volume (or weigh it)
• Recipe says Morton, you have Diamond Crystal: use about 1.5x the volume (or weigh it)
• Recipe doesn't specify a brand: assume Diamond Crystal if the author is American. When in doubt, start with less and taste

The safest approach is always to measure salt by weight. A kitchen scale removes all brand confusion.

How to season with kosher salt

Good seasoning is the single biggest difference between restaurant food and home cooking. These techniques apply whether you're searing a steak or roasting vegetables.

Season before searing. Salt meat 45 minutes to 24 hours before cooking. The salt initially draws moisture out, then the brine reabsorbs, seasoning the meat throughout and improving the Maillard reaction on the surface. I've found that salting steaks at least an hour ahead gives noticeably better crust formation than a last-minute sprinkle.

Kosher salt substitutes

If you can't find kosher salt, here's what works:

• Coarse sea salt -- the closest substitute. Look for additive-free varieties with a similar flake size. Measure by weight for accuracy.
• Fine sea salt -- usable, but its density is closer to table salt. Use about 2/3 the volume of what a recipe calls for in kosher salt.
• Table salt -- use half the volume of Diamond Crystal, or weigh to match. The flavor may have a slight metallic edge from iodine.
• Fleur de sel / Maldon -- too expensive for cooking, but fine in a pinch. Their flake structure is similar to kosher salt.

Outside the US, kosher salt is less common in stores. Coarse, additive-free sea salt is the standard substitute in most European and Latin American kitchens.

Kosher salt in baking

Baking is the one area where salt type genuinely matters for accuracy. Most baking recipes assume table salt unless they specify otherwise, because its fine, uniform crystals measure consistently by volume.

If a baking recipe calls for "1 tsp salt" without specifying type:

• Use 1 tsp table salt (what the recipe likely means)
• Or 1.5 tsp Morton kosher salt
• Or 2 tsp Diamond Crystal kosher salt
• Or just weigh 6g of whatever salt you have

For bread baking specifically, salt is usually calculated as a baker's percentage of flour weight, typically 1.8-2.2%. At that level of precision, weighing salt is the only reliable method.

Storing kosher salt

Kosher salt doesn't expire and doesn't need special storage. Keep it in a small, open bowl or a salt cellar near the stove for easy access during cooking. The open container makes pinching fast and natural.

Avoid storing kosher salt in a salt grinder. The crystals are already the right size for cooking. Grinding them defeats the purpose.

If your kosher salt clumps in humid conditions, break it apart with your fingers. Unlike table salt, it contains no anti-caking agents, so minor clumping is normal and harmless.

Kosher salt in Fond

When a recipe in Fond specifies salt, the ingredient list distinguishes between kosher salt and table salt. Fond's recipe scaling adjusts salt quantities by weight, so you get accurate amounts regardless of which brand of kosher salt you use.

Frequently asked questions

Is kosher salt healthier than table salt?

Chemically, all salt is sodium chloride. Kosher salt has no iodine, so if you rely on iodized salt for dietary iodine, switching entirely to kosher salt means getting iodine from other sources (seafood, dairy, eggs). In terms of sodium per gram, they're identical.

Can I use kosher salt for everything?

For most cooking, yes. The main exception is baking, where table salt's finer grains dissolve more evenly in batters and doughs. You can use kosher salt in baking if you weigh it on a kitchen scale rather than measuring by volume.

Why do recipes say "kosher salt to taste"?

Because the right amount of salt depends on your ingredients, your palate, and your brand of kosher salt. "To taste" is more accurate than a fixed measurement. It acknowledges that seasoning is a judgment call, not a formula.

What is the difference between kosher salt and sea salt?

Crystal structure and source. Kosher salt is mined, processed into large flakes, and contains no additives. Sea salt is evaporated from seawater and can range from fine to very coarse, sometimes with trace minerals that add color and subtle flavor. For cooking, coarse sea salt and kosher salt are interchangeable by weight.

How much kosher salt equals 1 teaspoon of table salt?

About 2 teaspoons of Diamond Crystal or 1.5 teaspoons of Morton. The safest method is to weigh: 1 teaspoon of table salt weighs 6g, so use 6g of whichever kosher salt you have.

Should I buy Diamond Crystal or Morton?

Either works. Diamond Crystal is the industry default and what most American cookbooks assume. Morton is more widely available in grocery stores. Pick one, learn its salting characteristics, and stick with it. Switching brands mid-recipe is where mistakes happen.