Does pistachio cream go bad?

Homemade pistachio cream (blended pistachios, tahini, sometimes oil) lasts 2-3 weeks refrigerated in an airtight jar. Commercial pistachio spreads often have preservatives and a longer shelf life (check the label). Signs of spoilage include off smells, mold, or significant oil separation that doesn't re-emulsify with stirring. Freeze pistachio cream for up to 3 months in a freezer-safe container; thaw in the refrigerator overnight.