Can you use cook in sauce that's 9 months out of date?

Using a sauce that's 9 months past its expiration date can be risky, depending on the type of sauce and how it has been stored. If the sauce shows no signs of spoilage, such as an off smell, strange color, or mold, it may still be safe to use. However, it's important to check for any changes in texture or taste. When in doubt, it's safer to discard the sauce to avoid potential foodborne illness.