Bread-Bakers v098.n035.9

To test yeast for vitality you need to "Proof" it, that is, mix it with
some warm water from the recipe, and perhaps a small amount of the sugar
in the recipe.  Within five minutes or so, it should have gotten all
bubbly and puffy.  That indicates you have lively yeast.  I never
(hardly ever) proof my yeast anymore.  Of course, I keep it in the
freezer, and use it up pretty quickly.  Proofing yeast is called for in
a lot of older traditional bread recipes.

Keep Baking Bread!

Ruth