Why Are My Cookies Flat?
There could be several reasons why your cookies are flat. Over-mixing the dough, not using enough leavening agents like baking powder or baking soda, or baking at a too-low temperature can all cause your cookies to flatten out. Additionally, the type of fat used in the recipe can impact the cookie’s texture. Butter, for example, has a low melting point, which can cause cookies to spread too much if not chilled enough before baking. Finally, make sure your oven is properly preheated and calibrated, as this can also affect how your cookies bake.