Hi Holly! Chilling the cookie dough will help prevent the cookies from spreading, so if you're going for a thinner cookie you'll want to chill the dough for a short period of time, if at all. If you're looking for some of the other benefits talked about here (deeper flavor, chewy/crisp texture) you might consider flattening the scooped balls of dough before baking them so they spread a bit more. Happy baking! 

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