Understanding The Stages of Your Sourdough Starter

When you’re learning to care for a sourdough starter, you might come across terms like active, peaked, discard, and more. If these words sound a bit cryptic, don’t worry! Each term is simply a shorthand for describing what stage your starter is in. By understanding these terms, you’ll be better equipped to keep your starter healthy and use it at the right time for delicious sourdough baking.

active sourdough starter bubbling over in a glass jar

In this post, we’ll break down each of these terms and what they mean for your baking.

1. Active Starter

An active sourdough starter is one that’s bubbly, airy, and full of life. This means the yeast and bacteria inside the starter are awake and busy, ready to help your dough rise. To get your starter to this “active” stage, it needs to be fed and then allowed time to rest at room temperature for several hours. Read more about feeding your starter here.

Signs Your Starter is Active:

It has lots of bubbles throughout the mixture.
It has risen to at least double its size after feeding.
It has a mild, pleasant aroma (a bit tangy but not overly sour).

When to Use It: When your starter is active, it’s ready to go into a bread dough. This is the ideal state for most sourdough recipes, as it will have the strength to make your bread rise.

2. Peaked Sourdough Starter

A peaked sourdough starter has risen to its maximum height and is at its most active. When a starter “peaks,” it’s at the perfect stage to be used in baking. This usually happens a few hours after feeding (4-12 hours, depending on temperature and the flour used). You can also determine the timing of when it peaks by the ratio you feed it, tho it will take some practice.

How to Tell It’s Peaked:

The starter is at its tallest point after feeding, often doubled or tripled in size.
If you tap the jar, it may start to collapse slightly, indicating it’s reached its peak.
The bubbles are very prominent, especially on the surface and sides.

When to Use It: Ideally, you want to use your starter right at its peak or just before it begins to fall. At this stage, it’s strong and will give your dough the best rise.

3. Falling or Collapsed Sourdough Starter

After the sourdough starter peaks, it will eventually start to fall or collapse. This is a natural part of the cycle. As the yeast and bacteria run out of food, the gases start to dissipate, and the starter shrinks. While a fallen starter is still active, it’s not as strong as when it’s just peaked.

Signs It’s Falling or Collapsed:

The starter has deflated or started to sink back down the jar.
It may have a slightly more sour or vinegar-like smell.
The bubbles may be fewer or smaller.

When to Use It: Although a collapsed starter can still be used, it may result in a less airy loaf. To “revive” it, discard some of the starter and feed it again, waiting until it peaks to use it in a recipe.

4. Discard

Discard refers to the portion of starter you remove before feeding. Each time you feed your starter, you should remove a portion (usually about half) to keep it from growing too large and to maintain the right balance of fresh flour and water. This discarded portion can be saved for other recipes like pancakes, muffins, but my all time favorite is sourdough discard crackers.

Why Discard?

Reduces the amount of starter you need to feed, saving on flour.
Keeps the yeast population balanced and healthy by regularly introducing fresh nutrients.

When to Use It: Discarded starter doesn’t have the strength to raise bread on its own, but it adds flavor and texture to recipes that use other leavening agents (like baking powder). Keep discard in the fridge in airtight containers or jars, and use it within a few weeks, or freeze it for longer storage.

5. Dormant Starter

A dormant sourdough starter is one that’s been refrigerated or otherwise inactive for a while. When you store your starter in the fridge, it goes “dormant,” meaning the yeast and bacteria slow down but don’t die. You can keep a starter dormant for weeks or even months if you’re not baking frequently.

Signs of a Dormant Starter:

It’s cool to the touch if it’s been refrigerated.
It may have little to no bubbles.
You may see a layer of liquid (called hooch) on top, which is normal.

When to Use It: Before baking with a dormant starter, bring it back to room temperature and give it a few regular feedings until it’s active and bubbly. Dormant starters need a little extra care to become strong enough to bake with again.

6. Hooch

Hooch is the liquid that sometimes appears on top of a dormant or underfed starter. It’s a byproduct of fermentation and is usually a sign that the starter needs food. Hooch can be poured off or stirred back into the starter before feeding. It’s often gray or brown and can have a strong smell.

When to Use It: Pour off the hooch if you find the smell too strong, or stir it in for a more sour flavor profile. Feed your starter afterward to get it active again.

Putting It All Together: How to Read Your Starter

Understanding these terms will help you read your starter’s cues and know exactly when it’s ready to use or needs a little extra care. By checking its activity and appearance, you’ll get to know your starter’s unique rhythm. Here’s a quick recap:

Active: Bubbly and ready for baking.
Peaked: At its strongest and perfect for immediate use.
Falling: Past its peak, may need a feed.
Discard: The portion removed before feeding; great for other recipes.
Dormant: Slowed down from cold storage; will need to be reactivated.
Hooch: Liquid that signals hunger; pour off or stir in before feeding.

Final Thoughts

Learning to care for a starter is like getting to know a living creature. Each one has its own rhythm, and once you get comfortable with the terms and stages, you’ll feel more at ease with your baking. Whether you’re working with an active starter for bread or collecting discard for a batch of pancakes, these terms are here to guide you to sourdough success. Enjoy the process, and happy baking!