The next time you see butter on sale, buy an extra supply — it freezes well and is so handy to have on hand.
• To freeze butter, wrap tightly in heavy-duty aluminum foil or plastic freezer wrap, or place inside a heavy-duty freezer bag.
• Frozen salted butter will keep at best quality for up to 12 months, unsalted butter will stay at best quality for about 6 months.
• To thaw frozen butter quickly, defrost the butter in the microwave in short (10-second) bursts at a low temperature until softened. Or grate frozen butter using the large holes of a cheese grater; it will thaw quickly.
• If you’re not in a hurry, you can thaw frozen butter in the refrigerator; it will take about 6 to 7 hours for a pound of butter. You can also submerge the butter (in a tightly sealed plastic bag) in cold water; it will thaw in about half an hour to an hour.