A while back, we wrote a post on growing and grinding your own grains in order to save virtual water on otherwise environmentally-unfriendly grains. In essence, corn and wheat can use a lot of water, but by employing grey-water techniques you could have an earth-healthy garden and still indulge in bread.
Of course, in that post, we forgot to touch on a major factor when it comes to bread: yeast. Even if you’re not milling your own grains in your garden, you may choose to make your own food from scratch, since this is generally better for both you and for your water footprint than eating processed foods from the store. Regardless of your reasoning, you may want to grow your own yeast, which is possible using the step-by-step instructions below.
GROW YOUR OWN YEAST
If you’re making your own bread or dough, you can also naturally grow your own yeast. Yeast spores naturally occur in the air, so growing the yeast is simply a process of growing these spores.
Start with 1 cup unbleached flour, and a plastic or wood bowl (not metal). Add just enough warm water to make a thick paste, and stir using a plastic or wood spoon (not metal). Cover with a cloth, and store in a cool, dark place.
Twice a day, add ½ cup water and stir. Eventually, the flour will become bubbly. This could take a few days. At this point, your yeast is good to eat. You can use it all at once, or use it bit by bit, adding flour and water to feed and replenish it.