Is there any way to test yeast to see if it is good? I always keep yeast in the fridge but am wondering if the freezer would be better. Thanks for any advice you can give me. —A.S., Bella Vista, ArkansasTo test or \”proof\” yeast to verify whether it’s still active, dissolve 1 teaspoon sugar in 1/2 cup warm water (110°-115°). Sprinkle with 1 packet or 2-1/4 teaspoons active dry yeast. Stir and let stand for 10 minutes. In 3-4 minutes, the yeast will have absorbed enough liquid to activate and begin to rise to the surface. At the end of 10 minutes, the yeast should have produced a foamy layer on the surface and can be used immediately. Remember to deduct 1/2 cup liquid from the recipe to adjust for the water used in the test. Unopened packages of dry yeast should be stored in a cool dark dry place and used by the \”best if used by\” date on the package. Opened packages or bulk dry yeast should be stored in an airtight container in the refrigerator for about 6 weeks or frozen for up to 6 months.