Not All Salt Is Created Equal

Salt, or sodium chloride (NaCL), is a daily essential many of us use without much thought. But have you ever wondered where it originates? Step into a spice shop, and you'll find an astonishing variety of sodium chloride. Take Kalustyan's, a renowned New York spice store and online retailer, which offers over 80 types of sea salt. What sets them apart?

Several factors. Similar to how terroir influences the taste of wine, the origin and source of salt affect its flavor, color, and culinary applications. While all salt is inherently salty, just as all wine is derived from grapes, the nuances of taste go beyond the basics. In this article, we delve into the origins of salt, from mines to seawater, and uncover what gives each type its unique characteristics.

From Rock Salt to Salt Beds

To understand the story of sodium chloride (NaCL), we must explore its roots. Much of the salt we use today comes from ancient salt mines, remnants of oceans that evaporated millions of years ago.

Around the globe, in regions with high temperatures, these ancient seabeds hold vast rock salt deposits. Humans extract this salt through mining, sometimes using a method called solution mining, where water dissolves the rock salt, and the resulting brine is pumped to the surface.

Another major source of salt is our oceans and salt lakes. Through solar evaporation, seawater in shallow ponds evaporates, leaving behind salt. This salt is then harvested using salt pans. These diverse sources are key to the unique flavors and applications of different salts.

The Great Importance of Salt

Though often seen as a simple seasoning, common salt is a massive global industry. It plays a vital role in sectors ranging from paper production and water treatment to cosmetics and textiles. In the culinary world, it’s a star, with various salts offering distinct flavor profiles that elevate dishes.

"Flavor is built on taste, aroma, mouthfeel (like texture and temperature), and what we call the 'X Factor' in 'The Flavor Bible,'" explained Karen Page, the book's author, via email. Co-authored with Andrew Dornenburg, this essential guide helps chefs and food professionals pair ingredients creatively.

Table Salt and Kosher Salt

Table salt, the most widely used type, undergoes extensive processing. Extracted from mines as rock salt or through solution mining, it’s refined into fine grains to prevent clumping. Often enriched with iodine, a nutrient crucial for thyroid health, it’s a staple in many households.

However, many culinary enthusiasts avoid table salt, opting for kosher or sea salt instead. Kosher salt, free of additives, gets its name from its compliance with Jewish dietary laws. Its coarse texture makes it a favorite among chefs and home cooks alike.

How the Oceans Produce Salt in So Many Flavors

Sea salt comes in a vast array of flavors, influenced by the origin of the seawater. While most store-bought sea salt is artificially evaporated, premium varieties are harvested from shallow ponds and salt pans that rely on natural evaporation, yielding unique salt crystals.

Salt collected from the top of the pans, like fleur de sel, is typically white and mild in flavor. In contrast, salt from the bottom, such as sel gris, often has a gray hue and a more complex taste due to minerals from the pan. Naturally evaporated sea salts can vary in texture, like Maldon Sea Salt from England, famous for its delicate, flaky crystals.

Mined salts also exhibit diverse colors and flavors depending on their source. Himalayan pink salt, for instance, is extracted from Pakistan's Khewra salt mine, one of the world's largest and oldest, dating back to Alexander the Great's era. Its pink tint comes from trace amounts of iron oxide.

Size and Texture Matters

As Page highlights, salt's impact goes beyond taste. "Texture, influenced by grain size, plays a crucial role in mouthfeel," she explained. "Fine grains dissolve seamlessly into dishes, while coarse grains add a satisfying crunch. Consider how coarse salt enhances the texture and flavor of a pretzel."

Salt grain size also dictates its culinary application. Fine salt is ideal for cooking, while larger grains, known as finishing salt, are often added just before serving.

"Timing is key when salting ingredients," Page noted. "Some dishes benefit from early salting, while others should be salted later or finished with a sprinkle just before serving. Finishing salts, which retain their texture and flavor, are best added at the last moment."

Don't Just Eat Salt, Savor It

Many culinary experts, including Page, maintain a diverse collection of salts. Page and her co-author Dornenburg always stock smoked salt in their kitchen. "It’s essential to have both sea salt and kosher salt available, along with a selection of finishing salts for various culinary effects," she explained.

"Smoked salt works wonders as a finishing touch for Andrew’s vegetarian split pea soup. Some vegetarian friends have even mistaken its smoky richness for ham! It’s just the salt adding that deep, savory flavor." Now that’s a garnish with impact!