What Makes Cookies Hard And Crunchy?
Cookies become hard and crunchy due to the low moisture content in the dough. When they are baked, the moisture in the dough evaporates, leaving behind a crispy and crunchy texture. Adding more sugar and extending the baking time can also make cookies harder and crunchier. The type of flour used can also affect the texture; using bread flour or adding cornstarch can result in a more dense and crunchy cookie.