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During this rest period, yeast ferments the dough and produces gases, thereby leavening the dough. In contrast, proofing or blooming yeast (as opposed to proofing the dough) may refer to the process of first suspending yeast in warm water, [1] a necessary hydration step when baking with active dry yeast.
The problem with active dry yeast is that it is temperamental and not super shelf stable. If your liquid is too cold (under 90 degrees), it may not work.
Instant yeast can be mixed directly into dry ingredients, whereas active dry yeast must first be dissolved and rehydrated in warm water. Instant yeast needs less time to rise. Since instant yeast has a finer texture than active dry yeast, it is possible to skip the initial rise time and shape loaves immediately after kneading.
1/4 cup warm water (105° to 115°F) Two 1/4-ounce packets active dry yeast. 2 cups sugar. 1 1/4 cups milk, warmed. ... stir together the water, yeast and 1 tablespoon sugar. Let stand until foamy ...
2 tablespoons instant or active dry yeast. 3 cups warm water (110° to 115°F) 2 tablespoons sugar. 2 teaspoons salt. 6-1/2 to 7-1/2 cups bread flour
Too warm a temperature slows growth, while even higher temperatures will kill the yeast. Death of the yeast cells occur in the range of 50–60 °C (122–140 °F). [ 19 ] [ 20 ] [ 21 ] When cooling a levain or sourdough pre-ferment, if the dough temperature drops below 10 °C (50 °F) it affects the culture and leads to the loss of a ...
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The sponge's fermentation time depends on its temperature and that of the surrounding area, the ingredients used, and the percentage amount of yeast. It ferments in a humid environment at 74–78 °F (23–26 °C), where it may rise and expand to 4-5 times its original volume, when it falls it has reached 66-70% of its allotted time.