Soft – Dough that’s “soft” or “runny” can be thickened by adding one or two tablespoons of flour to your mix. This will help keep your batch from “Spreading” and coming out of the oven looking like flat, not-so-cookie-like puddles.
This relates to the issue of creaming, because cold butter is more difficult to cream. Thus, if your butter is too cold, your cookies will be denser, and they will likely not spread enough in the pan when you bake them.
Mistake: When cookies turn out flat, the bad guy is often butter that is too soft or even melted. This makes cookies spread. The other culprit is too little flour—don’t hold back and make sure you master measuring. Finally, cookies will also flatten if placed and baked on hot cookie sheets.
David Nilsen is the former editor of Fourth & Sycamore. He is a member of the National Book Critics Circle. You can find more of his writing on his website at davidnilsenwriter.com and follow him on Twitter as @NilsenDavid.