I have a bread machine and when i follow the recipe putting boiling water, sugar, one packet of yeast, then let if foam for 15 minutes the yeast still isn't rising. What should do differently?
Bread – the yeast wont rise in the bread machine
breadyeast
Related Solutions
First off, how do you store your yeast? Storing yeast in the fridge helps it to last longer; I've had some yeast in my fridge for a year that is still going strong.
As your yeast begins to become ineffective, I would personally get new yeast. Once yeast looses its power, you're simply not going to get the same effect out of it.
It sounds like you may be missing a very important piece.
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Best Answer
Never use boiling water with yeast!
Using boiling water almost guarantees instant death.
Baker's yeast is a live organism, a unicelluar fungus saccharomyces cervisiae, very closely related to and in fact bred from brewer's yeast. And yes, it's alive even in those dried granules in small packages or boxes. It's metabolism digests carbohydrates and produces CO2 (what we want in baking because it creates a light and fluffy dough) and alcohol (of interest in brewing and winemaking).
Yeast is heat sensitive and while it will happily grow and multiply in lukewarm water, it starts to die at about 45 to 55 degrees C. Note that yeast does even grow at refrigerator temperatures, albeit slowly, in fact, many bakers prefer the long and slow fermentation over a quick warm rise.
This question/answer discusses temperature thresholds in detail.
If your recipe suggests the use of boiling water, it's faulty and I suggest simply using lukewarm water instead or finding another recipe altogether.