When it comes to storing yeast, there are a few options available. The best method will depend on how long you plan to store the yeast and how quickly you will be using it.
If you have just purchased yeast and it has a good purchase-by date, you can store it in a cool location such as a pantry or cabinet. This is a convenient option if you anticipate using the yeast within a few months. Make sure the location is away from direct sunlight and any sources of heat.
Another option is to refrigerate the yeast. Once opened, it is best to keep the yeast in the refrigerator to prolong its shelf life. This is especially important if you will not be using the entire package at once. The cool temperature of the refrigerator helps to slow down the yeast's activity and maintain its viability. It is recommended to use the yeast within four months of opening if stored in the refrigerator.
If you don't plan on using the yeast within four months or if you want to stock up on yeast for long-term storage, freezing is a viable option. Freezing yeast can extend its shelf life up to two years. Before freezing, it is important to transfer the yeast to an airtight container or freezer bag to prevent moisture from affecting its quality. Be sure to label the container with the date of freezing to keep track of its freshness. When you are ready to use the frozen yeast, allow it to thaw in the refrigerator before using.
In my personal experience as a brewer, I have found that refrigerating yeast is the most convenient and practical method for storing yeast. I often purchase larger quantities of yeast and use it over a period of several months. By keeping it in the refrigerator, I can be confident that the yeast will remain viable and ready for use whenever I need it.
To summarize, the best way to store yeast depends on your specific needs. If you plan on using it within a few months, storing it in a cool location like a pantry or cabinet is sufficient. If you want to extend its shelf life and use it over a longer period of time, refrigeration is recommended. Freezing is a great option for long-term storage, allowing you to stock up on yeast and use it for up to two years.