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Yeast Activity Test

Dry Yeast: How to Proof or Test Activity

  1. Using a one-cup liquid measuring cup, dissolve 1 teaspoon of granulated sugar in 1/2 cup warm (110-115°F) water.

    If you don’t have a thermometer, the tap water should be warm but NOT hot to the touch.

  2. Stir in one (0.25oz) packet (7g) or 2 1/4 teaspoons of dry yeast until there are no more dry yeast granules on top.
  3. In three to four minutes, the yeast will have absorbed enough liquid to activate and start to foam.
  4. After ten minutes, the foamy yeast mixture should have risen to the 1-cup mark and have a rounded top.
  5. If this is true, your yeast is very active and should be used in your recipe immediately.

    Remember to deduct 1/2 cup liquid from the recipe to adjust for the water used in this test.

  6. If the yeast did not rise to the 1-cup mark, discard this yeast.

Yeast Activity Test video tutorial

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