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Recipe: How to Proof Yeast / Yeast Freshness Test

Breads - Yeast Breads
Dear Tapashi,

Here is some information for you:

One packet of active dry yeast equals 1/4 ounce (7 grams) or 2 1/4 teaspoons.

YEAST FRESHNESS TEST
If you are unsure about the freshness of your yeast, use the following test to determine its activity.

Using a one-cup liquid measuring cup, dissolve 1 teaspoon of granulated sugar in 1/2 cup warm tap water at 110-115 degrees F.

Using a thermometer is the most accurate way to determine the correct liquid temperature. Any thermometer will work as long as it measures temperatures between 75 and 130 degrees F. If you don't have a thermometer, the tap water should be warm but NOT hot to the touch.

Stir in one 1/4 oz. packet (7g) or 2-1/4 tsp of dry yeast until there are no more dry yeast granules on top. Yeast should be at room temperature before using.

In three to four minutes, the yeast will have absorbed enough liquid to activate and start to rise. After ten minutes, the foamy yeast mixture should have risen to the 1-cup mark and have a foamy rounded top. 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.

If the yeast did not rise to the 1-cup mark, your yeast has little or no activity. Discard this yeast.

Source: Red Star Yeast

Happy Baking!

Betsy
MsgID: 3151331
Shared by: Betsy at Recipelink.com
In reply to: ISO: how much is a regular pkg of dry yeast
Board: Daily Recipe Swap at Recipelink.com
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