Cookies can be stored in the freezer for 8-12 months in an air-tight freezer friendly container or ziplock bag. Freezing them a few hours after baking will help them retain their freshness. To thaw your cookies, take out as many as you would like to eat the day before. Then place them in the oven at 350 degrees Fahrenheit for 5 minutes to get that fresh out of the oven taste.