You can freeze undecorated and decorated cookies. Just follow these easy directions and your cookies will stay fresh and delicious as if you made them that day.
First, carefully place cooled cookies in an airtight container. I like to use a Rubbermaid container but a freezer ziplock bag also works well. Also, do not be afraid to stack your cookies.
When you are ready pull them out and let them come to room temperature (usually 6-8 hours). Once they have come to room temp open the airtight container and your cookies are soft and delicious like you made them that day.