1. Begin by weighing your jar in grams and labeling it with the date.
2. Add 100 grams of whole grain rye flour and 100 grams of filtered water to the jar. Stir together thoroughly with a fork until it’s well combined and thick.
3. Cover the jar loosely with a lid or cloth and place it at room temperature for 24 hours.
4. Check for tiny bubbles which indicate fermentation is beginning. If nothing is happening, let it rest for another 24 hours.
5. After the second day, remove and discard half of the starter.
6. Add 100 grams of all-purpose flour and 100 grams of filtered water. Stir well and cover loosely again.
7. Repeat this feeding process every day.
8. Your starter should peak within 4 to 6 hours. Perform the float test to check its readiness.