Making a sourdough starter
This will take 5 days to establish. It’s really easy and just takes a minute or so of work each day.
Combine 1 1/2 cup whole wheat flour and 3/4 cup cold water in a widemouth quart glass jar. Cover with a piece of cloth and secure with a the ring part of a 2-part lid, or tie a string/elastic around it to secure. Leave at room temperature for 24 hours.
Stir the starter from the previous day. Remove 3/4 cup and put it into a bowl. Add 1 1/2 cup of wholewheat flour and 3/4 cup of filtered water. Mix and put in a clean quart widemouth jar, and cover as before. Discard the remainder of the starter, use it to make sourdough pancakes or feed it to your chickens!
Days 3,4 and 5
Repeat the instructions from Day 2.
You will see the starter gradually growing bubbly and bigger to reach the top of the jar. It is ready for use.