120grams(1 cup) whole wheat or rye flour(Day 1, then switch to all-purpose after)
120grams(½ cup) filtered water (Do NOT use tap water! Chlorine and chloramine, chemicals used to disinfect tap water, can kill the beneficial yeast and bacteria in a sourdough starter.)
all purpose flour (for feeding the starter Day 2-7)
Instructions
Day 1
Mix flour and water in a clean jar until no dry bits remain.
120 grams (1 cup) whole wheat or rye flour, 120 grams (½ cup) filtered water
Cover loosely with a paper towel or cloth and let sit at room temperature (around 70–75°F).
Day 2-7
Discard half of the starter (about 120 g).
Add 120 grams of fresh flour and 120 grams of filtered water. Mix well, cover loosely, and let sit.
all purpose flour , 120 grams (½ cup) filtered water
Repeat every 24 hours, switching to all-purpose flour after Day 1.
By Day 5–7, your sourdough starter should be bubbly, active, and ready to bake in your first loaf of bread!
Notes
Feeding a Sourdough Starter -Once your starter is established, it needs regular feedings to stay healthy:
At room temperature (daily baking): Feed once every 24 hours.
In the refrigerator (occasional baking): Feed once a week. Remove from the fridge, discard half, feed as usual, and let it become active before baking.
Storing Starter Tips -You can store your sourdough starter either:
On the counter: Perfect if you bake daily or every few days. Just feed it daily to keep it active.
In the fridge: Best for occasional bakers. Feed once a week and revive with a few room-temperature feedings before baking.
If you ever forget to feed it, don’t worry! Starters are resilient. With a few consistent feedings, most can bounce back.