Why Are My Cookies Flat (or Cakey, Puffy or Crumbly)?
A troubleshooting guide for the four most common cookie problems, and the one habit that prevents most of them.
Cookie recipes are small chemistry experiments, and small differences in butter temperature, flour or oven heat change the result a lot. Here is how to read what went wrong and fix it next time.
Bake one test cookie first
Before you fill a whole sheet, bake a single cookie. If it spreads too much, chill the dough longer or add a tablespoon of flour. If it does not spread at all, flatten the dough balls slightly.
Flat cookies that spread too much
| Cause | Fix |
|---|---|
| Butter too soft, or melted butter still hot | Use butter that is cool to the touch; cool melted butter 10 minutes |
| Not enough flour | Weigh it, or spoon and level |
| Dough went onto a warm baking sheet | Let sheets cool between batches |
| Greased baking sheet | Use parchment instead |
| Oven running cool | Check with an oven thermometer |
| Dough not chilled | Chill 30 minutes to overnight |
Cakey cookies
Too much flour, too much egg, overmixing, or a recipe with baking powder where you expected baking soda. Creaming butter and sugar for a very long time also whips in air that makes cookies puffy and cake-like.
Puffy cookies that don't spread
Too much flour, dough straight from a very cold fridge, or too little sugar. Let very cold dough sit for 10 minutes and press each ball down slightly before baking.
Crumbly cookies
Too much flour or too little fat or egg, and sometimes overbaking. Pull cookies when the centers still look a little soft; they keep setting on the hot sheet.
Hard cookies
They were overbaked or stored uncovered. Keep cookies in an airtight container, and add a slice of bread overnight to soften them again.
Put it into practice with our chewy chocolate chip cookies.
Questions, answered
Why are my cookies not spreading?
Too much flour, very cold dough or too little sugar. Let the dough warm slightly, flatten the balls and check that you are measuring flour correctly.
Does chilling cookie dough really help?
Yes. Cold fat melts more slowly in the oven, so cookies spread less and turn out thicker and chewier. The flavor also deepens.
Can old baking soda make cookies flat?
Old baking soda loses strength. Test it by adding a pinch to vinegar: it should fizz immediately.
