If the recipe calls for 1 Tbs of kosher salt do I use style flake salt?

Kosher salt and flaked salt are both coarse types of salt but with two different shapes and textures. Generally speaking, kosher salt is the best salt to use for cooking because it is easy to measure, dissolves quickly, and has a neutral flavor. Flake salt, on the other hand, is best used as a finishing salt because of its larger crystals and pronounced salty taste.

If the recipe calls for 1 Tbs of kosher salt, it is unlikely that you can substitute it for flake salt successfully due to the differences in their grain sizes. Kosher salt is coarser than flake salt, so if you use flake salt instead, you will end up using a lot more salt than the recipe intended.