What Is Kosher Salt? Uses, Substitutes, and Differences

Few ingredients in the kitchen spark as much confusion as kosher salt. It’s a staple in many pantries, yet its name leads to misunderstandings—like the idea that it’s automatically kosher-certified.

Crystal size: Coarser than table salt, typically 0.5–1.5 mm ·
Additives: Usually additive-free (no iodine or anti-caking agents) ·
Primary use: Koshering meat (drawing out blood) and general cooking ·
Chef preference: Preferred for easy pinching and even seasoning

The table below lays out how kosher salt, table salt, and sea salt differ — what matters for your cooking is crystal shape, density, and what each brings to the dish.

The takeaway: volume-based substitution is the biggest trap—brands differ in density, so weigh rather than measure when precision matters.

What is kosher salt?

How is kosher salt made?

• Kosher salt is produced by either mining underground salt deposits or evaporating seawater, then processed to create larger, irregular crystals. Unlike table salt, it typically undergoes no chemical treatment to alter crystal shape (Jacobsen Salt Co. – specialty producer).
• The crystals are formed without additives, resulting in a pure sodium chloride product. Some brands, like Diamond Crystal, use a special crystallization method that yields lighter, more porous flakes (Serious Eats – culinary authority).

What is the grain size of kosher salt?

• Kosher salt crystals are typically 0.5–1.5 mm, significantly coarser than the fine 0.1–0.3 mm grains of table salt (Jacobsen Salt Co.).
• This size gives kosher salt its characteristic crunch and makes it easier to pinch and sprinkle evenly over food (Jess Pryles – food writer).

Why it matters: crystal size is the single most important factor in how salt behaves on food—larger grains mean less dissolution and more surface adhesion, which is why chefs love it.

What is the difference between salt and kosher salt?

Three key differences separate kosher salt from ordinary table salt: crystal structure, additive content, and density. Here’s how they stack up.

Kosher salt vs table salt: crystal size and density

• Table salt has very fine, cubic crystals that pack tightly, weighing about 6 grams per teaspoon. Kosher salt’s larger, irregular flakes weigh 5–8 grams per teaspoon depending on brand (Serious Eats).
• Because of the air gaps between crystals, a teaspoon of kosher salt contains less sodium than a teaspoon of table salt—roughly half, according to food writer Jess Pryles (Jess Pryles).

Kosher salt vs sea salt: mineral content and texture

• Sea salt is also coarse but retains trace minerals from its source (magnesium, calcium, potassium), giving it a more complex flavor. Kosher salt is nearly 100% sodium chloride (Serious Eats).
• Flaky sea salt is the closest substitute in texture, but it’s pricier and often used as a finishing salt rather than an all-purpose cooking salt (Allrecipes – cooking resource).

The pattern: purity and crystal shape set kosher salt apart—fewer additives, more surface area, and a cleaner salt taste that won’t compete with other flavors.

What can I use instead of kosher salt?

Substituting table salt for kosher salt (volume vs weight)

• Because of density differences, 1 teaspoon of table salt equals about 1.5 teaspoons of Morton kosher salt or 2 teaspoons of Diamond Crystal kosher salt by volume (Serious Eats).
• By weight, the amounts are similar—table salt weighs ~6 g/tsp, Morton kosher ~8 g/tsp, Diamond Crystal ~5 g/tsp (Serious Eats). Weighing is the safest method.

Using sea salt or Himalayan pink salt as substitutes

• Coarse sea salt can replace kosher salt 1:1 by volume because the crystal sizes are similar (Allrecipes). Flaky sea salt is the closest match.
• Fine sea salt or table salt should be reduced by roughly 25% when substituting by volume (Jacobsen Salt Co.).

The catch: volume substitution without knowing the brand can ruin a dish—weighing your salt is the only foolproof method when swapping.

Why do chefs use kosher salt?

Ease of pinching and even distribution

• Chefs overwhelmingly prefer kosher salt because the large flakes allow precise fingertip control when seasoning. This “pinchability” makes it easier to sprinkle evenly over meat or vegetables (Jess Pryles – food writer).
• The crystals stick to food surfaces better than fine salt, ensuring seasoning adheres rather than bouncing off (Jess Pryles).

No additives that affect flavor

• Kosher salt typically contains no iodine or anti-caking agents, both of which can leave a metallic aftertaste in table salt (Jacobsen Salt Co.).
• This clean taste is especially important in finishing dishes where salt is the star—like on a ripe tomato or grilled steak (Serious Eats).

The trade-off: you gain control and purity but lose the uniform dissolution needed for baking—kosher salt is for cooking, not pastry.

Is kosher salt Jewish?

The link between kosher salt and Jewish dietary laws

• The name comes from its traditional role in the koshering process: salting meat to draw out blood, a step required by Jewish dietary laws (Orthodox Union – kosher certification authority).
• Any salt can be used for koshering, but the coarse grains of kosher salt are particularly effective because they adhere to the meat and don’t dissolve too quickly (Jacobsen Salt Co.).

Common misconception clarified

• Kosher salt is not automatically kosher-certified. A product may be called kosher salt but still lack a hechsher (rabbinical certification mark). Checking for a certification symbol is the only way to know (Orthodox Union).
• The term “kosher salt” is unique to American English; in other countries, the same product is often called “pickling salt” or “coarse salt” (Serious Eats).

The bottom line: kosher salt isn’t Jewish any more than hamburger is German—its name describes a use, not a religious status.

Kosher salt is not a religious product—it’s a cooking tool. Its coarse crystals and additive-free composition give home cooks and professionals alike a way to season with precision. The next time a recipe calls for kosher salt, you now know exactly what to reach for and why. For the home cook building a better kitchen, the choice is simple: keep kosher salt on hand for everyday cooking, use fine salt only for baking, and always weigh when substituting.