Beginner Guide
What Is Hooch on Sourdough Starter? (And Should You Pour It Off?)
That brown liquid on top of your starter is hooch — a sign your starter is hungry. Here's what to do.
Short answer: hooch is the brown liquid that forms on top of an underfed starter. It's alcohol produced by yeast when food runs out. It's harmless, smells strongly of alcohol, and means your starter wants a feed.
What hooch is
Hooch is:
- A clear-to-dark-brown liquid on top of starter
- Alcoholic (literally, it's a kind of weak beer)
- A signal of late-stage fermentation
- Harmless to consume but unpleasant
Color tells you about fermentation stage:
- Clear: young hooch, just starting
- Pale yellow: a few hours
- Light brown: 24+ hours
- Dark brown / black: several days, very neglected
Why it forms
After a feed, yeast and bacteria consume sugars and produce CO2 (rise), acid (sour), and alcohol (hooch). When sugars run out:
- Yeast slows
- Acetic acid bacteria continue
- Alcohol accumulates as a layer on top
- This is hooch
The longer between feeds, the more hooch.
Pour off or stir in?
You have a choice:
| Option | Effect |
|---|---|
| Pour off | Less alcoholic flavor, milder bread |
| Stir in | Slightly more alcohol/acid carried into bread |
Most bakers pour it off, feed, and move on. The starter doesn't care; it's about flavor preference.
Time to feed
Hooch tells you the starter needs feeding. Don't ignore it.
Plan:
- Pour off hooch
- Discard most of the starter (down to 10–20g)
- Feed with 50g flour + 50g water
- Wait 6–12 hours
- Should be back to normal vigor
How to prevent hooch
If hooch appears regularly between scheduled feeds:
- Increase feed ratio (1:5:5 instead of 1:1:1) — extends time between feeds
- Refrigerate between bakes — stops hooch development
- Feed more often — daily instead of weekly
- Use cooler maintenance temperature — slows fermentation
Hooch on a fridge starter
Refrigerated starters develop hooch as they sit. Normal.
When you pull it out:
- Pour off the hooch
- Discard most
- Feed
- Wait for activity (12–24 hours)
- Refresh once more before baking
A fridge starter that's hoocheh is fine; just refresh.
Hooch color and what it means
| Color | Stage | Action |
|---|---|---|
| Clear/yellow | <12 hours past feed | Feed soon |
| Light brown | 24–48 hours | Feed now |
| Dark brown | 3+ days | Feed twice to revive |
| Black | Weeks | Consider starting over if smelly |
Black hooch on a starter that's been forgotten for weeks is usually still fine — just very late. Refresh and watch for activity.
Hooch + acetone smell
A starter with hooch and an acetone smell:
- Yeast is hungry
- Alcohol production is high
- Feed immediately
- Will recover in 1–2 feeds
This is normal late-stage fermentation, not a problem.
Hooch + mold or pink
If you see hooch AND fuzzy mold or pink streaks:
- The starter has been neglected too long
- Bacteria/mold has taken over
- Discard, restart
Hooch alone is normal. Hooch + visible bad signs = discard.
Use hooch as a flavor lever
Some bakers stir hooch in for:
- More tangy flavor
- Slightly more alcohol carry-through (cooks off in oven)
- "Mature" sourdough character
Bakers who pour off get:
- Milder, cleaner flavor
- Less acidic byproducts
- Easier-to-handle dough
Try both ways with the same recipe and see which you prefer.
Hooch is not a problem
A first-time sourdough baker often panics at hooch. It's not an emergency.
The rule: hooch = hungry starter = feed it. Once you've seen it a few times, it's just a normal part of the cycle.
Building feed habits
If your starter regularly produces hooch and you don't bake often:
- Move to fridge after each feed
- Feed weekly (not daily)
- Larger feed ratio (1:5:5)
- Use within 1 hour of peak
This minimizes hooch development between bakes.
A side experiment
Take a portion of your starter, feed normally, leave on the counter for 48 hours.
You'll see:
- Initial rise and fall (12 hours)
- Hooch starts forming (24 hours)
- Pronounced hooch + tangy smell (36 hours)
- Brown hooch + alcohol smell (48 hours)
This timeline shows you how hooch develops over neglect. The starter will still revive with a few feeds.
Cooking with hooch
Some old-timers use the hooch from sourdough starter as a starter for other ferments (kvass, vinegar). It's drinkable but not pleasant straight.
Most home bakers just pour it down the drain and feed the starter.
Bottom line
Hooch is a signal, not a problem. Pour it off (or stir it in), feed your starter, and continue baking. A starter that occasionally develops hooch is doing exactly what starters do.