We recommend following the "Keep Refrigerated" directions printed on the labels of Vermont Creamery Butter and using by the date stamped on the package. Once opened, store butter in the refrigerator, wrapped or in a covered butter dish. Butter, once exposed to air, may become darker in color and have the flavor affected. For longer storage, Vermont Creamery Butter can be frozen in the original packaging for up to four months. To help the butter maintain its fresh delicate flavor, we suggest wrapping the carton in aluminum foil or in an airtight re-sealable plastic bag before freezing. Once the butter has been thawed, it should be used within 30 days.