I've wanted to try baking some salted caramel cookies, but I'm kinda wondering about the type of sea salt that you sprinkle on top of it at the end.

Most recipes would usually recommend sea salt flakes. The only one I could find around here is of the Maldon's brand. But I feel like its a bit too pricey and too much for something that I would probably used once or twice. After looking through a bunch of stores nearby, here are what I've found;

• Coarse sea salt
• Fine sea salt
• Iodized sea salt

Does it make a huge difference using any of these as opposed to regular sea salt flakes? Is there also a particular type of sea salt that I should avoid when making cookies/baking in general?