If, for some reason, your batter is too dry, add a tablespoon of water at a time, but don't add more than a tbsp at a time, and mix it each time to form that mound of dough. You don't want sticky biscotti dough, but you do want the dough to agree to be made into a mound then formed, but not crumbly.
Keyword crisp, crumbly, dunking, singular long