Bread Machine Yeast
Yeast is a type of fungus made from a single cell which will easily multiply if it’s stored in a moist environment and fed sugar. One pound of yeast contains 3,2 billion yeast cells and thrives primarily on sugar.
This type of yeast is made from the species and genus of yeast called Saccharomyces cerevisiae. The reproduction of yeast happens vegetatively through budding. Eventually each of the yeast’s cells will undergo this process between twelve to fifteen times until they won’t be capable of reproducing any longer. When it comes to commercial production of yeast, this happens in a special environment on media that contains sugar.
How Does Yeast Work?
Because it doesn’t produce chlorophyll or any other means of feeding itself, yeast is considered a fungus and it’s almost colorless. When yeast grows, it will turn into 2 substances which will eventually help with causing the changes in the foods people generally use it for. The 2 enzymes yeast produces are zymase and invertase and they are responsible for having starch converted into sugar and sugar converted into alcohol, CO2 and energy. It’s basically what people call the fermentation process and it’s the one responsible for making juice turn into wine and bread rise.
Yeast is very important not only for winemaking and beer, but it’s used extensively in order to make bread. When used for making bread, the alcohol will burn off while the CO2 will cause the dough to rise. On the market, yeast can be purchased moist as square cakes or dry, in packets or jars. The dry type of yeast should be used until the date indicated on the packet or jar and it should be kept in the fridge. In what regards the fresh yeast, it’s highly perishable and it’s recommended to be kept in the fridge for up to 2 weeks.
If hydrated, yeast can cause fermentation and that is why the majority of recipes out there will ask people to first of all mix the yeast with some water before they will add it to the flour mixture. By mixing water with yeast, individuals will also test whether the yeast is active or not, a process called “proofing”.
Types of Yeast
Active Dry Yeast: This is a popular type of yeast used by home bread makers. It can be purchased in packages, little jars or single use packets. This type is actually fresh yeast which has been dehydrated into small granules and it requires proofing when used, because it’s in a dormant state.
Instant Yeast (Also Known as Bread Machine Yeast): Depending on the brand, this type of yeast has plenty of names, such as “fast rise”, “quick rise” and “rapid rise”. It’s similar to dry yeast, but the granules don’t require proofing for activation and are also more porous. That is why when using it, people can add it to their ingredients directly. Manufacturers claim that this type works 50 percent faster compared to active dry yeast.
Due to the fact that yeast is a micro-organism, it will eventually die or expire. The expiration date is basically an estimate of the amount of time yeast will last for, but there are exterior conditions which can influence this (like storage, temperature and so on). Generally, it’s recommend people discard the yeast if it’s moldy, turned brown or has hardened.
Yeast should be kept in the fridge for around 2 weeks if it’s fresh yeast, otherwise, dry yeast can last up to a few years. It depends though on various environmental factors, like humidity and temperature.
With that being said, this is everything people interested in Yeast should know. By considering this information, they will be able to use it more productively and efficiently in the future!
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