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How To Feed, Care for, and Maintain Your Sourdough Starter

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Having a vigorous and healthy sourdough starter is the first step to baking great sourdough breads, rolls, muffins, and more.

In this post I will walk you through the care of a new starter, help you determine how much starter to keep on hand, and outline the steps of feeding your sourdough starter in preparation for baking. 

A locking-lid jar sits open to expose a bubbly sourdough starter within.

With Sourdough Starter, Consistency is Key.

I bake or cook with my starter at least twice a week, so my starter is constantly being refreshed with flour. The fresh flour is an ideal food source for the happy yeast and bacteria within the starter.

If you are just getting started with sourdough, I recommend you read my comprehensive guide on sourdough fundamentals.

This guide will give you an in-depth look at the complex bacterial systems working inside the starter. It will arm you with all the important terminology and explain what sourdough is and why it is better for you. And it will delve into the history of sourdough and its controversial usurper, rapid-rise yeast.

Demystifying Sourdough – Everything You’ve Ever Wanted To Know About Sourdough Starter – Why It’s Better for You and How To Start One

Sourdough starter that is active and fresh makes wonderful artisan bread!

Caring for a New Sourdough Starter

Keep it small so you don’t waste flour.

You won’t want to use your starter for discard projects until it is at least one week old. You won’t use your starter for bread until it is very active, usually two or more weeks. 

Discard 50% and feed daily.

In the beginning, you actually want to discard. Just go ahead and compost the starter that is removed from the jar. 

Use equal weight flour to water (100% hydration).

This is the best ratio for a starter that is thick and easy to work with, plus most of my recipes and many others call for a starter that is 100% hydration. 

Keep your jar clean.

Feed and mix your starter in a small bowl to really incorporate and aerate the ingredients. The extra oxygenation will give your fermentation a boost. Then transfer your starter to a clean jar for storage and fermentation.

Let it breathe.

Use a jar with a loose-fitting lid. I like a locking lid jar with the rubber seal removed. You want a little fresh air but not enough to dry out the top layer of starter or introduce dust or bugs. 

Watch it closely. Look for signs of hunger.

My starter recipe advises daily feeding for the first week and twice-daily feeding for the second week. But sometimes starters can get really hungry during the first weeks so it’s great to watch it closely and feed it whenever it has gone flat or there is liquid “hootch” forming on the top. 

Increase feedings as activity increases.

As your starter starts to come alive, feed it more regularly to give the yeast the boost they need to get them ready for bread making. 

Grow it when it’s ready.

When the starter is consistently doubling in volume in 4 to 8 hours, you can make a bigger starter by increasing the amount of flour and water during feedings. This will allow you to build the starter up to the desired size for baking projects. 

Time how long it takes to double in volume.

Paying attention to your starter is key. You want to get to know its preferences and fluctuations. Does it like a warm spot in the kitchen? Or does it rise well in the refrigerator? Knowing how long it takes to double in different environments will help when it’s time to ferment your bread or other doughs and batters.  

Use it and feed it frequently.

Best:

Using and feeding your starter weekly or more.

This schedule will keep your starter in tip-top shape; ready for anything you can think up!

Okay:

Using your starter every other week is still okay.

Your starter will most likely need an extra discard and feeding before using.

Borderline neglect:

Using your starter monthly or even longer between uses.

Life happens. I get it. I have let my starter languish for six months in the refrigerator during a busy and stressful time. You will definitely need to feed your starter two or more times prior to baking, a process that takes at least 8 to 12 hours per feeding.  

Don’t let it go to bed hungry.

Always feed your starter and allow it to start fermenting before storing it in the refrigerator. This will give the yeast and bacteria some energy to keep them happy during cold storage. 

Don’t give up!

So many people give up on sourdough baking because they get overwhelmed by the maintenance process. It can seem daunting, but in reality it’s a fairly straightforward process and the rest of this article is going to break it down further to make it even easier on you. 

The next step is to determine how much starter you want to have on hand for your needs.

How Much Starter Do You Need to Keep?

There are two main ways of keeping starter on hand for sourdough projects. You can keep a little or a lot. What’s the difference? Well, let me discuss.

A. Keep a small starter (50 to 100 grams) and feed it as needed.

This is a great option for the occasional baker who doesn’t want to mess around with using a lot of fully fermented sourdough starter out of the refrigerator. 

For this method a small starter is kept stored under refrigeration. When needed, it is removed from the refrigerator and the starter is built up to the desired volume over the course of a day or two prior to being used.

Pros: Less space needed, less potential waste.

Cons: Starter is not available for immediate use, requires planning ahead.

A Weck jar with 50 grams of sourdough starter.

B. Keep a large starter (300 to 500 grams) and use it liberally.

This option works really well for people who have many baking projects. You might want to make a batch of fully fermented pancakes or crackers immediately with the refrigerated starter, then feed it up again for making bread. Or if your starter is active enough you may be able to use it right from the refrigerator in bread making! 

For this method a large starter is built up before refrigeration and is available to use almost immediately when removed.

Pros: Lots of starter on hand for crackers, crepes, and maybe breads.

Cons: Takes up more space in the refrigerator, can lead to potential waste if not used in a timely manner.

I use the large starter method and am never sorry that I have happy fully fermented starter on hand for a multitude of uses. 

A tall broad jar with 400 grams of sourdough starter.

Refreshing Sourdough From the Refrigerator 

Refreshing a Small (50- to 100-gram) Refrigerated Starter  

  1. Remove your starter from the refrigerator and build it up to the desired size by feeding it with fresh flour and water. Allow it to ferment at room temperature until it reaches an active stage. Note: It may take two or more feedings for a very fermented starter to bounce back.
  2. Use a portion of the starter in your baking project. Always save 10 to 20 grams to inoculate your next batch of starter.
  3. Feed the saved portion with a 1:2:2 ratio (one part starter, two parts flour, and two parts water). Allow the starter to ferment at room temperature until bubbles start to form.
  4. Place the starter back in the refrigerator until it is needed again.
  5. Repeat this process as often as desired.

Refreshing a Large (300- to 500-gram) Refrigerated Starter

  1. Remove your large starter from the refrigerator and allow it to come to room temperature.
  2. Use a large portion of the refrigerated starter. If the starter is sour, use a recipe where sourdough starter discard is appropriate. If the starter is sweet and bubbly it may be used in any recipe. Note: A healthy well-balanced starter may not need to be fed before making bread.
  3. Feed the remaining starter with fresh flour and water, building it up to the desired size. Allow the starter to ferment at room temperature until it reaches an active stage.
  4. Either use a portion of the active starter in another project or put the starter back into the refrigerator.
  5. If you used some of the starter in step 4, feed it back up again now and allow it to start fermenting at room temperature before refrigeration.

How To Feed Your Sourdough Starter

Weighing your ingredients on a scale is a very important step in creating an easy-to-use and super-happy sourdough starter. The following instructions outline how to feed a 100% hydration starter (equal weights flour and water).

I recommend that an established starter be fed on a 1:2:2 ratio (one part starter, two parts flour, and two parts water). This gives the fermented starter plenty of fresh food and will create a vigorous, healthy, and well-balanced new starter.

Step 1

  1. Determine how much starter you need (e.g. 250 grams) or how much you want to feed (e.g. 50 grams). 
  2. Place a bowl or jar on the scale and set the weight to grams.
  3. Make sure to zero out the scale after placing the bowl on it but before adding any ingredients.
  4. Add 50 grams (one part) of your previous batch of sourdough starter.

Note: You can adjust how much fresh starter you make by using more or less fermented starter. If you have 100 grams of fermented starter you would feed it with 200 grams of flour and 200 grams of water, growing your starter to 500 grams. No matter what amount you start with, always use the same 1:2:2 ratio (e.g. 33:66:66 = 165 grams).

Step 2

  1. Add 100 grams (two parts) of organic flour to the bowl or jar. 

Personally and for starter feeding purposes, I use organic all-purpose flour and save my expensive local wheat and other heirloom and ancient grains for my bread.

Step 3

  1. Zero out the scale and add 100 grams (2 parts) water.

Using filtered water is the best practice. I recommend the Berkey Filters. They are the top-of-the-line, have great filter life, and are portable. You can even add on the fluoride/arsenic filters if your city or well water is contaminated.

If you don’t have access to filtered water you can use tap water that has been allowed to off-gas chlorine for at least 24 hours. Chlorine and other water additives can have a negative effect on sourdough microorganisms. 

 

Step 4

  1. Use a spoon or dough whisk to mix the starter until all the dry flour is incorporated and the mixture is fairly smooth.

 

Step 5 – Storing and Fermenting Your Starter 

  1. Place the starter in a storage container like this locking-lid glass jar.

I keep my starter in this large size so it has plenty of room to expand.

Make sure to remove the rubber sealing ring from the jar; this will allow the starter to breathe.

A jar with freshly fed and unfermented sourdough starter.

Step 6

  1. Let your starter ferment at room temperature.

In this picture the starter has doubled in size but has not yet peaked. If you are going to store your starter in the refrigerator, put it away now.

A jar with doubled sourdough starter.

Step 7

In this photo the starter has “peaked.” This means it has reached its peak fermentation and is at its most active.

At this point your starter is definitely ready to be incorporated into recipes. If using cups and spoons measurements, make sure to stir your starter down before measuring it. 

Don’t forget to feed your starter again after using it. Again, always feed your starter before you put it away in the fridge!

A tall broad jar full to the top with 400 grams of active sourdough starter.

Great Recipes for Using Your Fed and Active Starter

How To Bake the Perfect Sourdough Boule in Your Dutch Oven

This artisan sourdough boule fits perfectly into a Dutch Oven for baking!

 

 

 

 

 

 

 

 

 

 

Cinnamon Raisin Sourdough Bread

Cinnamon Raisin Sourdough With Maple Syrup Swirl

 

 

 

 

 
 
 
 

 

 

Sourdough Banana Nut Butter Muffins 

Really Easy Sourdough Muffins with Banana and Nut Butter

 

 

Val

Thursday 2nd of July 2020

Hi there,iam just loving watching your videos ,,you make it so easy to follow,just wondering when you take your starter out of the fridge the morning you want to bake you would first feed your starter then discard ,just not sure if recipe calls for more starter how do I make more starter to get what recipe calls for as I try to keep a smaller amount in fridge like 112 grams of starter ,and when do I start to bake when the starter is doubled or wait a bit longer maybe when it’s tripled Thanks so much Val

Butter For All

Tuesday 23rd of August 2022

Hi Val!

Sorry I missed this comment. I'll answer anyway I case it still helps you or someone else.

If you keep a 100g starter in the fridge you can just build it up prior to baking. I would probably mix up around 250g of fresh starter, 125g flour and 125g water, then add my 100g starter from the fridge. That will give you a total of 250g to use in recipes AND you'll still be left with 100g to put back in the fridge. You can adjust the amount however you want based on what you are making.

Hope that helps!

Courtney

Belinda

Monday 29th of June 2020

Hi Courtney, thanks for all this wonderful information. I started a starter about one month ago and it grew very well the first week. I used some for baking, and continued to feed and use it, but it has never since then doubled in size. I have tried to be consistent with feedings. I have tried changing the ratio of starter to flour and water keeping it at 100% hydration, I've read and researched as to why it won't grow any more. It gets nice bubbles, but no rise. Any suggestions? Should I just start over?

Butter For All

Tuesday 30th of June 2020

Hi Belinda!

You don't need to start over, just keep your starter small (100g) and discard (50g) and feed it (25/25) every 12 hours! It just takes time for the yeast and bacteria to balance out, that's why people keep starters so long, once they are happy they stay happy! have you watched my videos on YouTube? The Saturday Morning Sourdough episode one would be helpful!

Let me know how it goes!

Courtney

Carol Warner

Monday 11th of May 2020

Hi Courtney Thank you for your reply. It was most helpful. I re-read your instructions, and now it makes perfect sense (to my 60 year old fuddled brain) ?

Melody

Wednesday 27th of May 2020

Hi

Newbie to sourdough but excited for the journey. I’m on day 4 and going to start 2x every 12 hours feedings for my new starter. I’m using 50-50 AP/WW flours so my feeding is 75g starter, 100g flour, 100g water. What’s the ratio or hydration for this routine? I still don’t understand baker’s math.

TIA

Melody

Carol Warner

Saturday 9th of May 2020

Hi Courtney, Is it okay to maintain a starter using a 1-1-1 ratio? (Typically, I use 150g each of starter, flour and water) Should I be using less starter? Carol.

Butter For All

Sunday 10th of May 2020

Hi Carol,

It should be totally fine. That is a very common ratio. But it is right at 50% starter. I personally try not to go over 50%, I like to give my starter lots of food to keep it really active. So if it's working for you, and your starter isn't running out of food or getting overly sour, then you should be just fine. I know this ratio works well for many people! Hope that helps!

Courtney

Sandee

Thursday 30th of April 2020

I recently started some dry "San Francisco Sourdough culture" received via Amazon. Are there any truly discernable flavor differences between sourdough yeast from different parts of the world? I read that unless you have a very controlled situation the sourdough made at home will always get contaminated by your local yeast so there is no point in trying other starters. ??? What have you learned? Sandee in Maryland

Butter For All

Sunday 3rd of May 2020

Hi Sandee,

I think it's great to start your starter from a culture of strong yeast, it may change over time, it's hard to say if it will or won't. My personal experience is that my starter has changed, but I believe it's from the yeast on the flour not from the environment. With a strong culture, it is less likely to happen. Hope you have great success with your starter!

Courtney