Biscotti are baked twice, which is the entire point and the thing I hadn't understood — the first bake sets the log, then you slice it and bake again to dry them out. That second bake is where the snap comes from, and pulling them early gives you a soft cookie instead. The session is well sequenced around that: the log bakes, you talk, you slice, it bakes again, and you finish with something worth dunking.
Jordan