Active Dry Yeast is a type of yeast with a granular texture, similar to cornmeal. It is a living organism that is dormant, needs to be "proofed" and re-hydrated before use. Proofing involves putting active dry yeast in lukewarm water(110°F) before using. This will release the yeast and help it to work properly.
Active dry yeast is highly perishable. Always check for the expiration date before use. Read the labels carefully regarding its use and rehydration before purchasing.
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