The best way to store these gluten-free sandwich cookies is to drop them in an airtight container and keep them at room temperature for up to 3 days. After that, the cookies may become crumbly.u003cbr/u003eu003cbr/u003eThis recipe will also freeze well for long-term storage. Wrap the cookie sandwiches in plastic wrap and place them in a freezer bag or container. They will last up to 3 months in the freezer.u003cbr/u003e