What Is Yeast: The Fungus That Helps Dough To Rise
What is yeast, there are 2 main types of yeast, fresh yeast and dry yeast. Although dry yeast has several different kinds. The two main dry yeasts are regular active dry yeast and instant yeast. The main difference between these two dry yeasts is that, active dry yeast has a larger particle and will need dissolving in water before being used. The instant yeast can be mixed straight into the dry dough mix due to its finer texture. These two dry yeasts can be used alternatively depending on the bakers own recipes needs.
What Is Yeast?
The standard bread recipes can vary in quality by using different types of yeast, and this can change the characteristics of the finished bread product.
An Introduction To Instant – Active And Fresh Yeast
Instant yeast can be known by several different names these include: quick rise yeast, rapid rise yeast, fast rising yeast or bread machine yeast. The instant type of yeast will have a quicker raising time for the dough. Instant yeast has a much faster raising time than the dry yeast known as active dry yeast and fresh yeast.
The typical bread recipes can be altered in quality by changing the type of yeast in a dough and also the amount of yeast used in the product. Using less yeast in a standard recipe will result in a heavier finished bread and using more can result in a lighter finished product.
Instant yeast has a much faster raising time when used in breads due to the finer grains. These grains can absorb moisture quicker than the larger grains of active dry yeast. The instant yeast creates carbon dioxide from the sugars and starch in the dough. The carbon dioxide creates the bubbles that cause the dough to stretch and expand.
What Is Yeast – About Fresh Yeast
Fresh yeast can also be known as: cake yeast, wet yeast, fresh yeast or compressed yeast. It has been used by bakers for many years and is still used today. However fresh yeast is a lot harder to find, and will be found mainly in specialist stores. Due to the limited availability of fresh yeast many bakers use dry yeast in their baking.
About Active Dry Yeast
Active dry yeast has a larger grain size than the instant dry yeast. It is crucial that the active dry yeast is proofed in water before using. Due to the larger size of the grain. The various brands of active dry yeast will have their own advice on water temperature for the proof. Although the temperature is usually around 36 – 46 degrees Celsius.
Active dry yeast can be stored at room temperature if un-opened for up to a year. Also the yeast can be frozen, this will give it a much longer shelf life. Active dry yeast can be stored directly in the freezer in its sealed packet. A tip here is that the yeast can be used directly from the freezer without being de-frosted.
If you have opened the active dry yeast, it will have a shorter shelf life by up to 50 % of an unopened packet. The yeast will lose its power if stored at room temperature in an unsealed packet.
Dry yeast can be exchanged for instant yeast or bread machine yeast. The same quantities can be used if exchanging the type of dry yeast.
About Instant Yeast
Instant dry yeast is a good choice of yeast to use in bread machines. It is the easiest yeast to use as it can be mixed straight into the dry ingredients. It does not necessarily need to be mixed in warm water first. Instant dry yeast has finer granules than the active dry yeast.
The liquid part of the dough recipe should be warmed to around 48 – 55 degrees Celsius to make the dough. The instant yeast will have already been added to the dry ingredients.
A typical bread recipe will use 1 packet of the instant dry yeast.