These containers will help protect from the elements. If you can’t keep your dry yeast in the fridge or freezer after opening the package, then you can keep it in a sealed container. Don’t keep it near the stove (which tends to get much warmer than other areas of your home), heating vents, or other warm areas. If you want your instant or active dry yeast packets to last more than 2 years without keeping it in the fridge or freezer, you’ll need to keep it as cool as possible. However, the packaging doesn’t protect the yeast from high temperatures. So, yeast packets are already mostly safe from air and moisture. Air is usually removed from the package with a process called nitrogen flushing. Cool Locationĭry yeast is usually packaged in a metallic-type material that keeps out moisture. It’s not clear how long frozen yeast will last but it should be much longer than 5 years. The low temperature keeps the yeast cells in “hibernation” mode so they live much longer. Storing yeast in the freezer is even better than keeping it in the fridge. Instead, put the open yeast packets in an air-tight container first. Don’t just put the open yeast packets directly in the fridge: they will start to absorb moisture and die off faster. The important thing to know about storing yeast in the refrigerator is that the air inside can be very moist. Once the yeast pack or jar has been opened, it should be good for approximately 2 years in the fridge. Unopened packets of dry yeast can last approximately 5 years in the refrigerator. These are the elements that could “wake up” the yeast and cause it to start dying off. The key to storing yeast is to keep it away from moisture, heat, and air. Use more yeast: Depending on how old the yeast is, you might need to use much more to get the same rising effect.The yeast will activate, start to eat the sugars, and have a chance to multiply before you add the other dough ingredients. Feed the yeast some sugar first: Put the yeast in a bowl with some sugar and warm water.If it doesn’t, the yeast has lost some of its potency. Within 10 minutes, the mixture should foam up to twice its volume. Perform a yeast test before using: Dissolve 1tsp of sugar in ¼ cup of warm water (105-115F).I even heard one story of dry yeast working fine 13 years after its best-by date. However, there are plenty of accounts of expired yeast still working years after it expired. At higher temperatures, the yeast will die even faster. It varies depending on the storage conditions and strain of the yeast, but you can expect yeast to lose 10-25% of its viability per year at 68 degrees F (20C). Rather, when yeast goes bad, it means that the microorganisms have died and will no longer help the dough rise. Yeast generally doesn’t go bad in the sense that it becomes dangerous to eat. Once opening dry yeast, they recommend using the yeast within 4 months if it was kept in the fridge or 6 months if it was kept in the freezer. Red Star Yeast, for example, puts the “Best If Used By Date” for their dry yeast at two years from the date the yeast was packaged. Unopened, packets of instant and active dry yeast should last 2 years. Freeze-drying puts the yeast in a sort of hibernation so it lasts much longer. By contrast, active dry yeast and instant yeast are freeze-dried. Shelf Life of Yeastįresh yeast has a very short shelf life of just about 3 weeks in the fridge. This organism is very sensitive and can die if kept in the wrong storage conditions.ĭead yeast won’t work so it’s important that you store yeast in a way that keeps it alive. The instant and active dry yeast you use for baking is actually a living microorganism (Saccharomyces cerevisiae).
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