In a clean glass jar, mix 100g of all-purpose flour with 100g of room temperature water.

Using a spoon or spatula, stir the mixture until smooth and no dry flour remains.

Cover the jar loosely with a lid or plastic wrap and let it sit at room temperature for 24 hours.

After 24 hours, discard half of the mixture and add another 100g of flour and 100g of water.

Continue to feed your starter daily for 7 to 14 days.

After about 7 days, check if your starter has doubled in size within 4 to 6 hours of feeding.

If not using immediately, refrigerate it after it reaches maturity and feed it once a week.