The tray comes out at eleven minutes. The edges are set and lightly browned, the middles look wet, and one of them dents under your finger and stays dented. That’s not a verdict yet. Cookies do a real amount of their cooking after they leave the oven, so the pale middle you’re staring at might…

Cookies spread too much when the butter turns liquid before the eggs and starch have set, and nearly every cause on this page is a variation on that one race. You open the oven and the tray is a single sheet of cookie. Edges welded together, middles thin and greasy, half as tall as the…

One rule sorts most cases. A domed, dry cookie is carrying too much dry structure, and flour is almost always where that came from. A puffy but tender cookie is carrying too much air or too much lift. The rule holds for standard drop cookies. It breaks for doughs built on melted butter, where fat…

Weigh the flour. When cookies come out of the oven as the same domed lumps that went in, too much flour is the likeliest reason, and it is the one cause that stays invisible while the dough is being mixed. That rule holds for most drop cookies made from a recipe followed as written. It…

Freezing isn’t chilling with the dial turned further. The two do different jobs, and swapping one for the other quietly costs something. A night in the fridge builds flavor. A night in the freezer mostly stops time — it holds the dough as it was and hands back a cookie that spreads less. Both are…