What is "twice-baked bread"?

Twice-baked bread, also known as biscotti, is a type of Italian cookie that is made by baking bread dough twice to create a crunchy, dry texture. The dough is typically made with flour, sugar, eggs, and sometimes nuts or dried fruits, and is baked until it is firm and golden brown. The bread is then sliced into thin pieces and baked again at a lower temperature until it is completely dry and crisp. The result is a hard, crunchy cookie that is often enjoyed with coffee or tea. Twice-baked bread can be made with a variety of flavors and ingredients, such as almond, chocolate, or cranberry, and can be customized to suit individual tastes. It has become popular worldwide and can be found in many bakeries and cafes, as well as being made at home.