Yes, table salt can generally be substituted for sea salt in recipes. However, be mindful of the difference in grain size and sodium content, adjusting the amount accordingly.
Table salt and sea salt are both primarily sodium chloride (NaCl), but they differ in their processing and mineral content. Sea salt is produced by evaporating seawater, leaving behind trace minerals like magnesium, potassium, and calcium, which some believe contribute to a more complex flavor. Table salt, on the other hand, is typically mined from underground deposits and heavily processed to remove these minerals. It often contains additives like iodine and anti-caking agents.
The main difference affecting recipes is grain size. Sea salt often comes in larger crystals than table salt. If a recipe calls for a teaspoon of sea salt, using a teaspoon of finely ground table salt will result in a saltier dish because more salt crystals fit into the same volume. Therefore, when substituting table salt for sea salt, start with a smaller amount, about ¾ teaspoon for every teaspoon of sea salt, and taste as you go. You can always add more, but you can't take it away. Also, consider the texture. If the recipe relies on the crunch of sea salt flakes, table salt won't provide the same effect.
When substituting table salt for sea salt, especially in baking, weigh the salt instead of measuring by volume for more accurate results. A kitchen scale provides a consistent measurement, regardless of grain size, ensuring the recipe's flavor balance isn't compromised.