Mix 50 g flour and 50 g water in a clean jar
Stir until no dry flour remains
Cover loosely
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
Repeat feeding once every 24 hours
Keep discarding half before each feeding
Continue until the starter becomes bubbly and doubles in size within 4 to 8 hours after feeding
Use a consistent flour type and room temperature
Store in the refrigerator once active if not using daily
Feed before baking to refresh the starter