Keeping Your Sourdough Starter Strong
A mature starter stays active through regular, predictable feedings that match its consumption rate. You want a thick, pourable batter consistency that smells like fermented fruit or yogurt, rising consistently within four to six hours after a feeding.
Consistency is your primary ingredient.
Your starter is a living culture; it will adapt its metabolism to your kitchen temperature and the frequency of your feeding schedule.
- Digital scale
- Glass jar with straight sides
- Sturdy silicone spatula
What goes in.
- 50gmature starter
- 50gall-purpose or bread flour
- 50gfiltered water (room temperature)
Maintaining the balance
Always keep only a small portion of your old starter to inoculate the new flour and water. This prevents the acidity from building up too high and ensures the yeast has plenty of fresh fuel.
The method.
Weigh the jar
Place your clean glass jar on the scale and tare it. Spoon out all but 50g of your mature starter.
Add fresh fuel
Add the 50g of flour and 50g of water directly into the jar with the remaining starter.
Incorporate thoroughly
Use your spatula to stir until no dry streaks of flour remain. The mixture should feel like a thick, heavy paste.
Mark the level
Smooth the surface and place a rubber band around the jar at the current level of the starter to track its growth.
Ferment
Cover loosely with a lid or cloth. Set in a warm spot, around 70°F to 75°F, until it has doubled in volume.
Other turns to take.
The Refrigerator Hold
If you bake once a week, feed as usual, let it sit for two hours, then move to the fridge. It will slow down significantly, allowing you to feed it only once every 7 to 10 days.
The High-Activity Boost
Before a bake, feed with a 1:2:2 ratio of starter to flour to water to ensure the yeast is at peak vigor.
When it doesn't go to plan.
If your starter develops a dark liquid on top, it is hungry; pour it off and feed immediately.
Use filtered water if your tap water contains high levels of chlorine, which can inhibit wild yeast.
A clean jar is vital; avoid using soap that leaves a heavy residue or scent.
The ones that keep coming up.
How do I know if my starter has gone bad?
Unless you see orange or pink streaks—which indicates unwanted mold—it is likely just hungry or neglected. Keep feeding it consistently to push out the off-smelling bacteria.
Does it need to double every time?
Yes, a healthy mature starter should double within 4 to 6 hours when fed in a 1:1:1 ratio at room temperature.
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