Prepare yourself for a whole new kind of bread baking adventure. Pan de Cristal, otherwise known as Glass Bread, is a traditional loaf from the Catalan region of Spain. The high-hydration dough, which begins with a consistency so liquid it’s akin to pancake batter, stiffens up and becomes beautifully smooth and silky during fermentation. (The high protein content of our bread flour is a key ingredient for success here.) When shaped and baked, the result is a loaf with a shatteringly crispy crust and a beautiful, holey interior.  Note: For help fitting this bread into your schedule, see the table in “tips,” below, for a hypothetical timeline.