Why do my cookies come out flat?
Why do my oatmeal cookies go flat?
Just like a cold oven can affect your cookies, so can an oven that is too hot. Too hot and that butter in your dough can melt too quickly causing the cookies to spread too much before your flour mixture has a chance to harden. So be sure your oven temperature is correct.
How do you make cookies flat?
If you want a flatter cookie, eliminate 1 egg and cut back the flour to 2 cups. If you like a really crunchy cookie, add another egg white because it helps to dry out baked goods. If you prefer a moist and chewy cookie, eliminate one egg white and add 2 TBSP of milk.