I'm not sure why they say Kosher salt. I imagine that regular salt would work (use less of it...1/8 tsp.) 1 Tablespoon table salt equals 2 Tablespoons of Kosher salt. I happened to have Kosher salt on hand because I make Kettle Corn with it....yummmmy. The recipe turned out great. I took it to the Quilt Guild and there wasn't anything left. If you try regular salt, let me know how it turns out.
Lynn