How Long Does Yogurt Last?

How long does unopened yogurt last?

Unopened yogurt lasts 1-3 weeks past the printed date when properly refrigerated at 40 degrees F or below. The 'best by' date on yogurt is typically conservative; sealed containers stay good for 2-3 weeks beyond the date when stored correctly. Greek yogurt, skyr (Icelandic yogurt), and labneh last slightly longer than regular yogurt because the straining process reduces moisture content and concentrates the protective acids and bacteria. Store unopened yogurt in the main fridge body (not the door, which fluctuates in temperature each time the fridge opens). Always check the printed date; some specialty or smaller-batch yogurts have shorter shelf lives than mass-market brands.

How long does opened yogurt last?

Opened yogurt lasts 5-7 days refrigerated when stored properly. Keep yogurt in its original container with the lid sealed tightly between uses, or transfer to airtight containers for slightly longer shelf life. Always use clean utensils when scooping; introducing bacteria from used knives or spoons accelerates spoilage. Single-serving yogurt cups used as portion containers (eat directly from the cup) extend shelf life since no foreign utensils contact the bulk yogurt. Yogurt left at room temperature for more than 2 hours should be discarded due to bacterial growth risk.

How can you tell when yogurt has gone bad?

Bad yogurt shows clear signs. Mold growth (white, blue, green, pink, or black fuzzy patches) anywhere on the surface or inside the container means immediate discard; soft dairy can't be partially salvaged when moldy. Pink or yellow discoloration beyond the natural color indicates spoilage. Excessive watery separation that doesn't stir back in (a normal thin layer of whey on top is fine and can be stirred in or poured off; widespread liquid means the structure has broken down) suggests spoilage. Sharp, unpleasant fermented smell beyond the normal mild tang indicates spoilage; fresh yogurt smells gently tangy, while spoiled yogurt smells distinctly sour and unpleasant. Texture changes to grainy, lumpy, or fully runny indicate bacterial growth. Off taste (bitter or sharper than expected) means immediate discard. The normal whey separation on the surface is just liquid concentrated by the bacterial culture and is fine to stir back in.

Can you freeze yogurt?

Yes, yogurt freezes for 2 months, though the texture changes upon thawing. Frozen-then-thawed yogurt separates significantly and becomes grainy because the water content forms ice crystals that damage cell walls. Thawed yogurt works fine for cooked applications (smoothies, baked goods, marinades, sauces) but loses its smooth spoonable texture for direct eating. Greek yogurt freezes better than regular yogurt due to lower moisture content; the texture change is less dramatic. To freeze: portion into freezer-safe containers or freezer bags, leaving a little headspace for expansion. Frozen yogurt cups (the dessert kind from the freezer aisle) are a different product designed for freezing and last about 2 months in the freezer in original packaging. Thaw frozen yogurt in the fridge overnight; never thaw at room temperature.