Yeast is a micro-organism produces asexually and is grouped into the fungus family. Yeast is an essential part of the production of many different foods and drinks, as yeast has the ability to convert carbohydrates to carbon dioxide and alcohols. Yeast is used in the brewing of beer, root beer, the making of wine, and to bake bread. Yeast is also able to ferment sugars. Without yeast, the aforementioned foods would not be what they are. However, there was a time when yeast was not considered an ingredient in food. It took the discovers of Louis Pasteur to get yeast classified as an official ingredient of beer. To this very day, that information is utilised in the home brewing of beer. Brewer’s yeast is the essential ingredient in brewing all beer today.
Brewer’s yeast is scientifically known as Saccharomyces cervisiae
Brewer’s yeast is scientifically known as Saccharomyces cervisiae. This brewer’s yeast ferments carbohydrates, which cause the foam to form on top of fermenting beer. Brewer’s yeast is classified into two different categories, top cropping and bottom cropping. Top cropping brewing yeast causes the foam to form at the top of the beer, and bottom cropping yeast causes the foam to form at the bottom. The top fermenting brewing yeasts are more suited for ale type beers while bottom fermenting are suited for lager type beers. In the brewing process, the yeast is added to malt and hops to ferment the mixture. Over a period of time, the beer is fermented at different temperatures. Some brewers use different types of brewing yeast to brew specialty beers. At one point in time, only malt, hops and water were legally considered ingredients of beer. Louis Pasteur researched the properties of yeast, and did experiments that managed to get yeast classified as an ingredient.
Yeast is also used in the winemaking process. The yeast converts sugar in grape juice to ethanol, thus giving it its alcoholic properties. A type of yeast naturally grows on grapes, but many times brewing yeast is added to the grape juice to cause proper fermentation. Brewer’s yeast is also used in the brewing of hard apple cider. The yeast is added to the juice of apples to begin the fermentation process, resulting in apple cider. Yeast is available in dry and wet form. Typically, dry yeasts are subject to more processing. Wet yeasts are usually fresher and produce better results.
Yeast is good nutrients
Outside of brewing beer, wine and cider amongst others, yeast is used for baking bread, and is also used a nutritional supplement. Yeast also not only ferments the beer, but it contributes to the aroma and flavour of the beer. It is important to not confuse the yeast for baking bread with brewer’s yeast. If baking yeast is used in place of brewing yeast, the resulting product will have the flavour of raw bread dough. The temperature of the beer that is being brewed is also important. Some yeast will not ferment below certain temperatures. Before beginning to brew any beer, it is best to determine what type of beer is being made. The type of yeast chosen greatly affects this. Otherwise, choosing prime ingredients and following the brewing process properly will ensure a great tasting beer.