How to Test or Proof Yeast -- Testing Yeast for Freshness or to See if it is Active
It is recommended that you proof or test your yeast to determine the strength, freshness and assure that it is still active. Here is a simple test for yeast. You can then use this mixture in your dough; just be certain to reduce the amount of liquid in your recipe by 1/2 cup.
What you will need to test yeast
- 1/2 cup lukewarm water (110°F to 115°F/43°C to 46°C)
- a liquid measuring cup
- 1 teaspoon granulated (white) sugar
- 2 1/4 (or 1 package) teaspoons yeast
To test your yeast
- Place 1/2 cup of lukewarm (110°F to 115°F/43°C to 46°C) water into a liquid measuring cup.
- Stir 1 teaspoon of sugar into the water.
- Sprinkle 2 1/4 teaspoons of yeast over the surface of the water.
- Place the cup in a warm area and allow to sit for 10 minutes undisturbed. The mixture should foam and rise to the 1 cup mark. If this does not occur, discard this yeast and purchase fresh yeast.