A flat cookie can be a frustrating outcome for any baker. There are several reasons why cookies may flatten during baking, including improper ingredient measurements, oven temperature, baking time, and the type of fat used in the recipe.
One of the most common reasons why cookies flatten during baking is that the recipe includes too much butter or oil. When a cookie dough contains too much fat, the cookies will spread out and flatten as the fat melts during baking. To prevent this, bakers should ensure that they are measuring their ingredients accurately and following the recipe instructions precisely.
Finally, the baking time can also affect how cookies turn out. If cookies are overbaked, they may spread out and become flat and thin. Bakers should monitor their cookies closely while they are baking and remove them from the oven as soon as they are lightly golden around the edges.
In conclusion, there are several reasons why cookies may flatten during baking, including too much butter or oil, oven temperature, overmixing, the type of fat used, and baking time. Bakers should ensure that they are measuring their ingredients accurately, preheating their oven to the correct temperature, mixing the dough only until the ingredients are just combined, experimenting with different types of fat, and monitoring their cookies closely while they are baking to achieve the perfect, perfectly shaped cookie.