Refrigerate cooked pasta within 2 hours at 40 °F (4 °C) or below and use it within 3 to 4 days. Best freezer quality is about 1–2 months.
The 3–4 days is safety guidance under the USDA leftovers rule; the freezer figure is a quality target. Like rice, cooked pasta left warm can support Bacillus cereus growth — cool it promptly.
Safe to freeze; plain pasta softens. Sauced pasta bakes and casseroles freeze much better than plain noodles.
Slightly undercooked pasta survives freezing best. Freeze baked pasta dishes assembled — they reheat almost unchanged.
Prepare & portion. Toss plain pasta with a little oil to prevent clumping; portion before freezing.
Package. Freezer bags for plain pasta; foil trays or containers for baked dishes.
Thaw & use. Drop plain frozen pasta into boiling water or sauce for a minute; reheat dishes to 165 °F (74 °C).
Reheat from frozen in sauce or boiling water, or thaw dishes overnight in the refrigerator. Reheat to 165 °F (74 °C).
Do not refreeze reheated pasta; refrigerator-thawed dishes may be refrozen with quality loss. The general rules are in the refreezing guide and the Refreezing Decision tool.