Although I use unsalted butter in almost all of my cooking, I realize that many people use only salted butter. If you normally use salted butter, continue to do so. But because my recipes were created with unsalted butter, you will want to reduce the amount of salt you add to avoid oversalting. I also encourage you to use unsalted butter when making desserts that have a high proportion of butter, like cookies. I strongly believe that we use too much salt in our desserts, and part of that can be corrected by not using salted butter.