How Long Pesto Will Still Taste Good After Opening - Chowhound

While some condiments don't ever really expire because they include shelf-stable or fermented ingredients, pesto isn't one of them. Unfortunately, the sauce's standard recipe — basil, garlic, cheese, salt, olive oil, and pine nuts — features a few things that aren't immune to the ravages of time. Pesto only remains fresh as long as its most perishable ingredient: basil. Advertisement Anyone who's grown the…