I make breads with both an instant dried yeast and my homemade natural leavening. The instant dried yeast is very useful when I am in short supply of bread and want to make it rapidly. Also these bread tastes light, so they are good when I want to make bread with butter and milk. For example, breads such as sweet buns, rolls, sandwiches, and burger buns etc. I can experience the flavors of their ingredients and fillings directly.
On the other hand, the breads made of natural leavening have a complex taste. They are sweet, sour and sometimes a little bit bitter. So, I use it when I want to bake without butter and milk like baguette or pain de campagne. I love their unique flavor of their own.
I will show you how to make the homemade leavening with an apple.
I chopped an apple and put it into a disinfected bottle. Then fill it with water to the top and cover it with a plastic wrap and an elastic band. The easy way to disinfect the bottle is to use a microwave. Wash a bottle and with the bottle still wet, put it in the microwave for 3-4 minutes. The reason I fashion a lid with a plastic wrap is to avoid an explosion. Don’t be scared, but if you shut it tightly, it may explode from the pressure of carbon dioxide gas expired from fermentation.
How does it ferment? The Saccharomyces cerevisiae is working. What is the Saccharomyces cerevisiae ? For me it is too difficult to explain in English! In simple terms, it is a kind of yeast used for brewing. The Saccharomyces cerevisiae degrades sugars to alcohol and carbon dioxide gas. I can’t explain that process in detail, so if you want to know you will find it by searching “alcohol fermentation “.
Anyway, keep the bottle at room temperature (about 68 degree) for 3-4 days. Stir it with a big spoon once or twice a day, or it will go bad.
Can you see small bubbles on the apple slices? It started fermenting. These bubbles are carbon dioxide gas.
In this time, it took 5 days. How long it will take is depends on the room’s temperature and the condition of apple. The natural yeast is active on around 68°F. In a cold room, it will take much more time.
Then I removed the apple from the bottle and kept it in the refrigerator.
Please don’t forget to stir! Don’t wash the apple too much before you cut it, because the Saccharomyces cerevisiae will be washed away. So, apples without wax are the best if you find them.
To be continued “Home made natural leaven 2 (apple)”
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