Mix 50 g flour and 50 g water in a clean jar
Stir until no dry flour remains
Cover loosely with a lid or cloth
Leave at room temperature for 24 hours
Discard half of the mixture
Add 50 g flour and 50 g water
Stir well and cover loosely again
Repeat feeding once every 24 hours
Keep discarding half before each feeding
Continue for 5 to 10 days
Watch for bubbles and a sour smell
Use the starter when it doubles in size within 4 to 8 hours after feeding
Store in the refrigerator and feed weekly if not using daily