8 April 2008
Sugar is used in testing yeast. To test yeast: Add 1/2 teaspoon of sugar to the yeast when stirring it into the water to dissolve. If it foams and bubbles within 10 minutes, you know the yeast is alive and active.
You do not need to be exact in measuring yeast. Remember it's going to multiply like crazy anyway. A little less is fine; the dough will rise more slowly and may taste better.
IMPORTANT: WASH HANDS AFTER USING BAKER'S YEAST - People who bake bread and fail to wash their hands afterward are at risk of picking up a yeast infection. Baker's yeast is a live organism.