This is how to test your yeast.
* Exported from MasterCook *
Active Yeast Test
Recipe By : Linda Rehberg
Serving Size : 1 Preparation Time :0:00
Categories : Bread-Bakers Mailing List info
Amount Measure Ingredient -- Preparation Method
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To test your yeast to see if it's still active, dissolve 1 tsp sugar
in 1/2 cup warm water (110 - 115 F) in a glass measuring
cup. Sprinkle 1 scant tablespoon yeast slowly over the
surface. Stir; allow the mixture to sit for 10 min. Within the
first 5 min, the yeast should begin rising to the surface. At the
end of 10 min, if the yeast has doubled and reached the 1 cup mark
and has a rounded crown of foam, it is very active. Yeast that is
inactive or losing Its potency will either not react at all or will
not reach the 1 cup mark within 10 minutes. In either case, discard
the yeast and buy new.
Linda Rehberg is the co-author of the Bread Machine Magic cookbooks
published by St Martin's Press.