Homemade cookies will typically remain fresh longer when stored in an airtight container rather than in the fridge. Here's why:
Airtight Container: Storing cookies in an airtight container helps to create a barrier against moisture and air. When cookies are exposed to air, they can become stale and lose their crispness or softness, depending on their texture. An airtight container helps maintain the cookies' freshness by preventing air from reaching them and slowing down the staling process. Properly stored in an airtight container at room temperature, most homemade cookies can stay fresh for several days to a week, depending on the type of cookie.
Refrigerator: While the fridge can extend the shelf life of some food items, it's not the best place to store cookies. Refrigeration can actually have negative effects on the texture and taste of many cookies. The cold, moist environment of the refrigerator can cause the cookies to absorb excess moisture, leading to a loss of their desired texture and taste. Cookies stored in the fridge may become soft, mushy, or even take on a slightly stale or off-flavor.
For best results, store homemade cookies in an airtight container at room temperature in a cool, dry place. If you want to extend their shelf life further, you can also consider freezing them. Just make sure to place them in an airtight container or freezer bag before freezing, and they can last for several months in the freezer without significant loss of quality.