Cookies can be stored in the freezer if sealed well. I do not recommend freezing meringue type cookies though.
If they get hard from leaving out in the air or not being sealed properly on your counter top, wet the inside of the container cover (I run it under the faucet and leave it dripping wet) and put it back on the canister. By morning the cookies are usually again soft, but if very hard, you might want to do it more than once. Some use bread or apple, but these leave flavors from the bread or apple in the cookies and will make the cookies close to the bread soggy and the others hard.
Raw cookie dough can be frozen ahead and taken out for holiday or later baking. This is especially good with cut-out dough, chocolate chip, molasses, oatmeal and other similar type cookie doughs.
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