Biggest Mistakes When Making Cookies

Making cookies isn't always easy.
Business Insider broke down some common mistakes when making cookies.
Sometimes forgetting to chill the dough can cause cookies to spread too much in the oven.
Overcrowding the pan can lead to some wonky cookies.
Opening the oven door too many times can make it tough for cookies to bake evenly.
Avoid overmixing the dough.
Using stale baking powder or soda might make the cookies fall flat.