How Do I Know If It’s Dead? And Other Sourdough Starter Questions, Answered (2024)

Sourdough for Beginners

Meghan Splawn

Meghan Splawn

Meghan was the Food Editor for Kitchn's Skills content. She's a master of everyday baking, family cooking, and harnessing good light. Meghan approaches food with an eye towards budgeting — both time and money — and having fun. Meghan has a baking and pastry degree, and spent the first 10 years of her career as part of Alton Brown's culinary team. She co-hosts a weekly podcast about food and family called Didn't I Just Feed You.

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updated Dec 8, 2022

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If I had a dollar for every text, DM, or phone call I’ve answered about sourdough starters just this month, I’d have enough funds to start a small bakery. Make no mistake — I welcome the opportunity to demystify the process of creating, feeding, and baking with a sourdough starter at home.

Caring for a starter shouldn’t be scary, and it only takes a few minutes of time each day (and even less once your starter is established).

Below, I’m answering five of the most common questions about feeding and maintaining a sourdough starter, gathered from Kitchn readers, my friends, and our own Apartment Therapy sourdough Slack channel.

But, First: What Is a Sourdough Starter?

A sourdough starter is a simple mixture of flour and water that has collected natural yeast and bacteria, which give natural leavening (aka rise) and flavor to baked goods. A starter can be substituted for commercial yeast or work in tandem with yeast to raise breads, biscuits, and more.

1. Did I kill my starter? And how do I know if it’s still alive?

A healthy, lively starter that has been properly fed has a clean, slightly yeasty scent and a bubbly surface. Remember — a brand new baby starter isn’t going to have much aroma or bubbles for the first few days, so if your starter is new, it’s likely not dead, it’s just not active yet.

The most common mistake people make when starting a sourdough starter from scratch is storing it in too cold of a location. Make sure your starter is at room temperature while you’re building it.

It’s also very common for starters to have a lot of activity in the first few days and then slow down. The first few super bubbly days are often a result of other bacteria coming to play in the starter, but when they die off, the bubbles will slow or even stop. Keep feeding your starter, and you’ll see normal activity (bubbles) return in a few days.

If your starter has a bit of dark liquid on top, it’s not dead! It simply means it’s hungry and that it’s time to feed it. Unless your starter has a pink or orange hue or is beginning to mold, you probably haven’t killed it yet.

As long as you do your best to create a consistent feeding routine for your starter and store it in the same spot everyday, it should be fine. Pretty soon, you’ll develop an eye for what makes your starter happy.

2. I want to try this, but I only have whole wheat flour at home right now. Will that work?

Yes, absolutely! Whole wheat and rye starters are pretty common in professional bakeries, and can also be fed and maintained with all-purpose flour later on down the line. Keep in mind that whole wheat and rye starters might need more than one feeding a day (most get fed every 12 hours) as they have more available “food” for the hungry bacteria and yeast in your starter.

3. When is my starter strong enough for baking?

A new starter will be ready for bread baking within 7 to 10 days. The best way to tell if your starter is ready is to feed it and measure its growth in a four hour period. A healthy, robust starter should double in volume within four hours of feeding. If it does double, begin the next step of the process (the levain) immediately.

You can also perform a “float test” which is a little less reliable, but can be used if you feel pretty confident in your starter and want to skip the feeding test. Just fill a cup with room temperature water and add 1 teaspoon of your starter. If it floats, it’s ready to go!

4. When you say discard half the starter, what do you mean? Throw it out?

You’ll discard half the starter to keep the ratio of starter to flour and water consistent, and so that you don’t end up with a gallon of starter when you only need a cup or two for most baking projects.

If you’re following Kitchn’s starter guide, you’ll begin “discarding” after day 4 of establishing your starter. You can throw discard away, but you can also use this discard to make another starter to share with a friend or save it for cooking and baking. Personally, I keep an airtight container of discard in my fridge for baking biscuits and making crackers and pancakes.

5. Can I take a break from my starter?

Yes, after your starter is established (about 10 days after you created it), you can move it from room temperature storage, where you feed it everyday, to the fridge. A starter stored in the fridge can be fed once a week. If you plan to use it often, you can store it for up to two months without feeding. When you want to use the starter again, remove it from the fridge for a few hours, then feed it every 12 hours for 36 hours before you make bread with it.

Need a really long break? You can even freeze your starter!

Sourdough for Beginners: Meet Your Crew

More Sourdough Resources

  • How To Make Sourdough Starter from Scratch
  • How to Make Sourdough Bread
  • Beginner Sourdough Sandwich Loaf
  • Essential Sourdough Equipment: Here’s Everything You Need to Make Sourdough Bread at Home

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How Do I Know If It’s Dead? And Other Sourdough Starter Questions, Answered (2024)

FAQs

How Do I Know If It’s Dead? And Other Sourdough Starter Questions, Answered? ›

The first few super bubbly days are often a result of other bacteria coming to play in the starter, but when they die off, the bubbles will slow or even stop. Keep feeding your starter, and you'll see normal activity (bubbles) return in a few days. If your starter has a bit of dark liquid on top, it's not dead!

Why is my starter bubbling but not rising? ›

If your starter gets completely covered on top with bubbles but does not rise, it is healthy but may just be a wet mix. Try reducing the water in your next feeding and see if you have different results. Also, the type of flour you are using can impede the rise of your starter.

What does rotten sourdough starter look like? ›

And sometimes, you don't know what happened or got in there, but you know it's rotten or growing mold. If your starter has visible mold, usually with fuzz, or has pink or orange spots (not just dry specks or hooch), it's probably a goner and must be thrown out. That's why keeping a backup is so important!

What if my sourdough starter fails the float test? ›

Many sourdough recipes rely on the float test to determine whether a starter is ready to bake. If your starter doesn't pass this test, you may need to wait a few hours (or several days) before you can try again.

What does fully active sourdough starter look like? ›

In terms of ripeness, in a liquid starter, you'll see lots of bubbles and aeration, and the mixture will be loose, and if you gently pull back the top layer or stir it, you'll feel how the mixture has broken down. A ripe, stiff sourdough starter.

What happens if your starter doesn't float? ›

If it sinks to the bottom, the starter is presumably not ready, requiring further time and feedings before use in your sourdough recipes.

Should I stir my sourdough starter between feedings? ›

stir your starter in between feedings - try stirring it twice in between feedings and really give it a chance to get oxygen into the mix. This will help to activate your starter without too much effort.

Is my sourdough starter dead? ›

Keep feeding your starter, and you'll see normal activity (bubbles) return in a few days. If your starter has a bit of dark liquid on top, it's not dead! It simply means it's hungry and that it's time to feed it. Unless your starter has a pink or orange hue or is beginning to mold, you probably haven't killed it yet.

What temperature kills sourdough starter? ›

Yeast will die if exposed to temps of 60C or above (140F). It is very likely that your sourdough starter will actually die at temps lower than this. Anything above 120F (50C) would be considered too hot for a sourdough starter and will kill the wild yeast if exposed for long periods.

What is a bad smell for sourdough starter? ›

A dead sourdough starter might have a particularly unpleasant smell, like rotten eggs or spoiled milk. If your starter smells like this and shows no signs of activity (no bubbles or rise), it might be dead.

How do you test a sourdough starter? ›

You can perform a float test to check if your starter is ready. Take a small spoonful of the starter and drop it into a glass of water. If it floats, it indicates that the starter is sufficiently active and ready for use.

What does over fermented sourdough starter look like? ›

A dark watery layer, called 'hooch' (see this video) will appear on its surface, but that's absolutely normal – it doesn't mean your starter has died. This is just a sign that your starter has over fermented. Just remove the hooch before you feed your starter again.

Why is my sourdough starter bubbling but not doubling? ›

Some sourdough starters double within 24 hours, others take a few weeks of feeding and coaxing. The truth is, if your starter is bubbling, then it's showing that there is signs of fermentation. If it's not doubling (or even tripling) then it's not ready to bake sourdough with. Give it more time to develop and mature.

What is the sourdough poke test? ›

With the “poke test” you put some flour on your finger and poke the dough. If it springs back immediately, it needs more time.

How do I know if my sourdough starter has bad bacteria? ›

Rancid or Putrid Smell – If your starter has a rancid, putrid, or even rotten odour, then it is likely to have spoiled or have been contaminated. This could be due to the growth of harmful bacteria or mould. In this case, it is best to discard the starter and start fresh.

How do I know when my sourdough starter needs feeding? ›

The usual advice is to feed a sourdough starter when it has reached peak expansion. That is usually when yeast population is also at its peak. And it is a reliable indicator of the starter's status. There is a large amount of variation between the peak expansion of different starters.

How long does it take for sourdough starter to be active? ›

The general rule of thumb is that it takes about 10-14 days to develop a starter strong enough to rise a loaf. Experienced sourdough aficionados may be able to bake with a new starter in as few as five days. And, for less experienced bakers who struggle with the process, it may take up to 30 days.

How long after feeding is sourdough starter most active? ›

A mature sourdough starter will reach its peak around 2 to 4 hours after being fed. If it's particularly cold, or you've given it a huge feeding ratio, this could be extended to 12 hours.

What should active sourdough starter smell like? ›

When your starter reaches the last stage and stabilizes it will develop its own characteristic smells. However, despite the name "sourdough", a healthy sourdough starter usually has a fresh yeasty smell with, perhaps, a bit of an astringent note to it.

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