Keeping Butter and Eggs Fresher Longer
Butter can pick up off-flavors and turn rancid if kept in the refrigerator longer than a month. If you don't use a lot, store butter in the freezer for up to 4 months in a zipper-lock bag and thaw sticks as needed.
Legally, eggs may already be up to two months old by the end of the "sell by" date, so it's best to check for freshness yourself. If an egg has an unpleasant odor, discard it. Store eggs in the refrigerator for 3 to 5 weeks.