Hello Lisa! Including ice cubes or water on your oven can definitely assist with crust progress (specially when baking sourdoughs!). Though It is far from Totally important, it can help build a wonderful loaf. Here is a tiny bit more details on the procedure: Baking bread with steam Satisfied Baking! https://knoxmkgcw.blogpostie.com/50460353/5-easy-facts-about-sourdough-bread-recipe-described