Store them in an airtight container at room temperature for up to 3 days. If you want to keep them longer, freeze the baked cookies or freeze the dough. You can freeze the cookie dough for up to 3 months. Scoop the dough into balls, freeze them on a baking sheet, then transfer to a freezer-safe bag. You can also freeze baked cookies and reheat them in a low oven for a few minutes. To enjoy frozen cookies, let them thaw at room temperature or warm them in the oven.