Expiration & Storage Tips
When does rapid rise yeast expire?
Rapid rise yeast usually stays good for up to two years if unopened and stored in a cool, dry place. Once opened, it's best to use it within four months. If you store the opened yeast in the refrigerator, it can last for up to six months, and if it's frozen, it can last even longer, up to a year. However, remember that the potency of the yeast will diminish over time, and your dough may not rise as expected towards the end of these time frames.
How do you tell if rapid rise yeast is bad?
Determining if your yeast has expired is essential, as bad yeast is ineffective in baking. If your yeast is no longer good, it will fail the 'proofing' or 'foaming' test. Simply mix a teaspoon of yeast with 1/2 cup of warm, not hot, water (about 110°F), and a dash of sugar. If it's good, it will start to froth and foam vigorously within 10 minutes, indicating that it's still alive and kicking. If there's no action, it has expired and is time to throw out.
Tips for storing rapid rise yeast to extend shelf life
• Always seal the yeast tightly in its original packaging or an airtight container.
• Store unopened yeast in a cool, dry place, like a pantry. Once opened, store your yeast in the refrigerator to extend its lifespan.
• If you won't use yeast often, you might consider freezing it. Store it in a freezer-safe container or bag. When ready to use, let it return to room temperature before proofing.
• Always check the expiration date on the packet and perform the foaming test before baking if your yeast has been stored for a long time.