Kosher salt isn’t universally “better” than table salt, but it does have real advantages for most cooking tasks. The two are chemically identical (both sodium chloride), so the differences come down to crystal size, additives, and how each one behaves in your kitchen. For seasoning meat, finishing dishes, and controlling saltiness by hand, kosher salt wins. For baking and meeting your iodine needs, table salt still has a role.
Why Cooks Prefer Kosher Salt
The big, coarse crystals of kosher salt are easier to pinch, distribute evenly, and see on food. That visibility matters more than it sounds. When you’re seasoning a chicken breast or salting vegetables before roasting, being able to see where the salt landed helps you avoid over- or under-seasoning. Table salt’s fine grains slip through your fingers quickly and dissolve on contact, making it harder to gauge how much you’ve added.
Kosher salt also tastes cleaner to most people. Table salt is typically iodized and contains anti-caking agents that can introduce a faintly metallic or bitter note. Kosher salt is usually just sodium chloride with no iodine and minimal additives, so it lets the flavor of your ingredients come through without interference. This difference is subtle in a heavily sauced dish but noticeable when salt is front and center, like on a sliced tomato or a piece of grilled steak.
Sodium Content Per Teaspoon Varies
Because kosher salt crystals are larger, there’s more air between them. A teaspoon of kosher salt contains less sodium than a teaspoon of table salt. Harvard’s nutrition department puts the numbers at roughly 2,300 mg of sodium per teaspoon for fine table salt, compared to about 1,920 mg for coarse kosher salt. Diamond Crystal, which has an especially flaky, hollow crystal structure, drops even further to around 1,120 mg per teaspoon.
This doesn’t mean kosher salt is “lower sodium.” Gram for gram, the sodium is identical. The difference is purely about how densely the crystals pack into a measuring spoon. If you’re swapping kosher salt into a recipe written for table salt, you’ll likely need more of it by volume to hit the same saltiness. If you’re eyeballing salt by pinch rather than measuring precisely, kosher salt gives you a bit more margin for error before a dish becomes too salty.
The Two Major Brands Are Not Interchangeable
One of the biggest pitfalls with kosher salt is assuming all brands measure the same. They don’t. Morton and Diamond Crystal, the two dominant brands in the U.S., have dramatically different crystal densities. One cup of Morton’s kosher salt weighs about 241 grams, while one cup of Diamond Crystal weighs only 137 grams. That’s nearly a 75% difference by weight for the same volume.
In practical terms, if a recipe calls for one cup of Diamond Crystal, you’d use just over half a cup of Morton’s. When a cookbook or recipe doesn’t specify which brand, it’s worth checking. Many professional recipe developers default to Diamond Crystal because of its lighter, flakier texture, which dissolves faster and is more forgiving if you accidentally add a pinch too much.
Where Kosher Salt Truly Excels
Dry brining is where kosher salt’s crystal structure gives it a clear, functional advantage over table salt. When you rub coarse salt onto raw meat, it draws moisture to the surface through osmosis. That moisture dissolves the salt, which then gets reabsorbed into the meat, where sodium and chloride ions interact with proteins and cause the tightly wound muscle fibers to relax. The result is meat that holds onto more water during cooking and comes out juicier.
Large kosher salt grains are ideal for this because they cling to the meat’s surface and dissolve slowly, giving you time for even distribution. Fine table salt tends to dissolve into the meat almost immediately, making it harder to spread evenly and easier to accidentally over-salt one spot. For the same reason, kosher salt works well as a finishing salt. Sprinkled over a salad, a chocolate chip cookie, or french fries just before serving, the larger crystals deliver small, distinct bursts of saltiness rather than a uniform, diffused flavor. You actually need less salt this way because the bigger crystals make better contact with your taste buds.
Where Table Salt Still Works Better
Baking is the main area where table salt holds an edge. Bread doughs, cake batters, and cookie doughs depend on precise, even salt distribution throughout the mixture. Table salt’s fine grains dissolve quickly and incorporate uniformly, so you don’t risk biting into a pocket of undissolved salt in your muffin. Coarse kosher salt, particularly Morton’s, can be slow to dissolve in cold or thick mixtures, leaving uneven seasoning in the final product.
Cold liquids are another case. If you’re salting a salad dressing, a cold brine for pickles, or ice water for blanching vegetables, fine salt dissolves faster and saves you the step of grinding or waiting. Some bakers use extra-fine popcorn salt for the same reason.
The Iodine Question
One genuinely important health consideration: kosher salt almost never contains iodine. Your thyroid gland needs iodine to produce hormones that regulate metabolism, and not getting enough can lead to an enlarged thyroid (goiter) or an underactive thyroid. Adults need about 150 micrograms of iodine daily, an amount you can get from roughly half to three-quarters of a teaspoon of iodized table salt.
If you’ve switched entirely to kosher salt and don’t regularly eat seafood, dairy, eggs, or seaweed, you could fall short on iodine over time. This is more of a concern in regions where the soil is naturally low in iodine and where iodized salt was the primary dietary source. It doesn’t mean you need to go back to table salt for everything, but it’s worth being aware of where your iodine comes from. Many people get enough through other foods without thinking about it.
So Which Should You Use?
For general cooking, seasoning by hand, grilling, roasting, and finishing dishes, kosher salt is the more practical choice. Its forgiving texture, clean flavor, and ease of handling explain why it became the default in professional kitchens and most recipe development. For baking, dissolving into cold liquids, and ensuring you get enough iodine, table salt still has a place in your pantry. The “better” salt depends entirely on what you’re doing with it, but if you had to pick just one for everyday cooking, most cooks would reach for kosher salt.