My starter is looking very sorry: a 48-hour sourdough starter rescue plan
Katie C. said her starter was looking very sorry, which is exactly the sort of message sourdough people send each other with a mixture of hope and mild panic.
The good news: a tired starter is usually not dead. If it has been left in the fridge, missed a few feeds, smells sharp, has a layer of hooch, or barely bubbles, it normally needs consistent food, warmth, and a little patience. The trick is not one huge heroic feed. It is 3 or 4 sensible feeds over about 48 hours, using the starter feeding calculator to keep the grams and timing under control.
First, check it is safe
If the starter has fuzzy mould, pink or orange streaks, or smells rotten rather than acidic, do not try to rescue it. Bin it and start again. Grey, brown, or black liquid on top is usually hooch, and that is much less dramatic than it looks.
The rescue idea
Keep a small amount of starter, feed it fresh flour and water, let it rise somewhere warm, then repeat. Each feed dilutes the old acidic starter and gives the yeast and bacteria a cleaner run at fresh food.
For a weak starter, I like beginning gently at 1:1:1. That means equal weights of starter, flour, and water. Once it starts bubbling and rising more convincingly, move to 1:2:2 or 1:3:3 so it has more food and can build strength without peaking too quickly.
A simple 48-hour plan
Use the starter calculator for each feed. Put in the seed starter, flour, water, room temperature, and start time. The calculator will help you judge when the next feed is likely to be ready, instead of treating every kitchen like it is the same temperature.
- Feed 1, morning: keep 20g starter. Add 20g water and 20g flour. Use mostly organic white flour if that is what you bake with, but add a little wholemeal or rye if you have it.
- Feed 2, evening: keep 20g of the revived starter. Add 40g water and 40g flour. This is a 1:2:2 feed.
- Feed 3, next morning: if it rose well, repeat 1:2:2 or go to 1:3:3. If it barely moved, go back to 1:1:1 and keep it warm.
- Feed 4, next evening: build the amount you need for baking. Use the calculator so you have enough active starter for your recipe, plus a little left to keep.
What should change?
After the first feed, you may only see a few bubbles. That is fine. After the second or third feed, you want clearer rise, bubbles through the sides, a domed or aerated top, and a smell that is pleasantly tangy rather than harsh or boozy.
Do not feed too early if nothing has happened. A starter cannot get stronger from being constantly diluted before it has had time to ferment. But do not leave it collapsed for ages either. The best moment is around peak, or shortly after peak, when it has risen and is just beginning to settle.
Temperature matters more than people admit
A starter that looks hopeless at 18°C may look completely normal at 23-25°C. Keep it warm, not hot. On top of the fridge, near a warm appliance, or in an oven with the light on can help, but do not cook it. If it feels hot to your hand, it is too hot for the starter.
When is it ready to bake?
Use it when it can rise predictably after a feed, looks bubbly throughout, and smells balanced. For a bread dough, it should be strong enough to double after a normal feed in a reasonable window. If it takes forever, give it another feed before asking it to raise a loaf.
Once Katie's starter is back to behaving itself, the next move is simple: use the starter feeding calculator to time the final build, then use the bulk fermentation calculator when the dough is mixed. The starter gets rescued first. The loaf gets judged second.
Useful references
This plan follows the same practical pattern recommended by experienced sourdough resources: discard and refresh with fresh flour and water, feed consistently, keep the starter warm enough to ferment, and judge readiness by rise, bubbles, smell, and peak timing.