Kickstart Your Sourdough Starter With a Poolish!

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Introduction: Kickstart Your Sourdough Starter With a Poolish!

I have had many friends who have made Mark Bittman and Jim Lahey's no-knead bread but have been hesitant to make the jump to a natural starter. I have met other people who have tried making their own sourdough starter unsuccessfully. Learning how to use a starter is very simple, and after many years I have come up with my own method of kickstarting my starter. Whenever I go through a period of months when I have no time to make bread, and I find my starter in the back of my fridge all black and smelly, I begin anew and make make a poolish. A poolish is essentially a starter made of equal parts (by weight) of flour and water and a pinch of yeast. After a few cycles of feeding and interacting with the wild yeasts in the air, the starter takes on a more acidic and yeasty aroma that develops increasing complexity and flavor over time.

Step 1: Begin With Equal Parts Flour and Water (by Weight)

If you are going to do any kind of bread baking you should go ahead and spend $13 on a kitchen scale. In this Instructable I will to stick with volume measurements to illustrate how easy this process is and stay consistent with the original recipe. Mix equal parts flour and water (by weight):

  • 3/4 cup flour (118 g according to my scale)
  • 4 oz water (118 g)

Usually for my starter I like to use equal parts whole wheat and bread flour, but in this picture I used only whole wheat flour because I had run out of bread flour at home.

I use cold filtered water from the refrigerator, which slows the fermentation considerably, but that also lets the yeast flavor develop more fully.

Step 2: Add a Pinch of Yeast...

Add a pinch of yeast. Mix the poolish with a spoon. It will be sticky to the touch. Cover with a cloth or plastic wrap and set aside until it doubles in size and has lots of small bubbles on top, approx 6-12 hours depending on the amount of yeast and temperature of water you used.

Step 3: After 6-12 Hours the Poolish Is Ready to Use

The poolish will double in size and have lots of air bubbles in it. Now your poolish is ready to use!

Empty the poolish into a large mixing bowl or stand mixer. A little bit of sticky dough will remain in the bottom of the container. The yeast remaining in the mixture in the container, plus whatever yeast is in the air in your house will grow to be the starter for your next batch of bread. Now you are going to feed your starter. Add 3/4 cup flour (118 g according to my scale) and 4 oz water to the starter container. Mix with a spoon. Cover with plastic wrap or a cloth.

  • Within 24 hours at room temperature, your starter is ready for your next batch of bread.
  • You can also refrigerate the mixture for up to a week and remove 2-4 hours before using
  • After 4-5 feedings the starter should take on more wild yeast aromas and your bread will take on increasing complexity and flavor

Step 4: Now You Need to Do a Tiny Bit of Math

To complete your bread recipe you need to do a little arithmetic. For example the original no-knead bread recipe is:

  • 3 cups all purpose flour
  • 1 5/8 cups water
  • 1 1/4 tsp salt
  • 1/4 tsp instant yeast

You need to subract the amount of flour (3/4 cup), water (1/2 cup), and yeast that you already used for your poolish, which leaves you with:

  • 2 1/4 cups all purpose flour
  • 1 1/8 cups water
  • 1 1/4 tsp salt

The same logic applies if you are using weights instead of volume for your measurements. Subtract the weight you used in the poolish from the recipe to find out what to add. For example if:

  • The recipe calls for 500 g flour and 350 g water
  • You use 100 g flour and 100 g water (+ a pinch of yeast) to mix your poolish

The remaining flour and water to add would be 400 g flour and 250 g water to complete your recipe.

The rest of the steps for baking are the same as if you did not use the poolish.

Step 5: Blend the Ingredients in the Wet Dough

This step is what gives the "no knead" recipe its name.The long bulk rise (12-18 hours) in the next step allows for gluten formation, which omits the need for extensive needing when you mix the ingredients.

Combine the poolish, flour, water, and salt in a large mixing bowl. If you use a stand mixer run it on slow for 1-2 minutes until all the ingredients are fully blended.You will have a wet, sticky batter.

Some people mix the poolish, flour, and water first, and let the dough rest for 15-20 minutes before adding the salt. This step is called the autolyse and makes the dough easier to handle.

Transfer the dough to a large mixing bowl with a dash of olive oil on the bottom. I like to turn the dough a few times by hand within the bowl so it forms a neat ball with some olive oil on the surface.

Step 6: The Bulk Rise: Slower Is Better

This step is called the bulk rise. Cover the mixing bowl with plastic wrap or a clean cloth and leave it to rest in a cool location that is not exposed to drafts or extensive sunlight.

  • In Mark Bittman's recipe he recommends 12-18 hours of bulk rise time.
  • I have had the best results letting the dough rise for 2 hours at room temperature then transferring the whole container to to the refrigerator overnight.

When the bulk rise is complete the dough will have doubled in size and have lots of bubbles on the side from the gluten formation. If the dough has not doubled then it will need more time to rise.

Step 7: Shaping and Proof

Remove the dough from the refrigerator and shape into a ball through by folding the dough into itself, forming a ball and building the surface tension at the surface of the dough.

Dust with flour and let rest about 15 minutes. This is called the bench rest.

After 15 minutes, shape again and place the dough seam-side up in a proofing basket for 2-3 hours. If you do not have a proofing basket place the loaf seam side down on a flour-coated cutting board, dust again with flour, and cover with a cotton (non-terry) towel.

At least 30 minutes before the dough is read, start pre-heating the oven to 450 degrees with a dutch oven inside. I have used a six-quart enameled lodge dutch oven for hundreds of loaves of bread, not to mention mac and cheese, stews, and soups. I have always wondered if I will get more oven spring with a 3.2 quart combo cooker as Chad Rodgers recommends in the Tartine Bread cookbook. Some day I will try it, but first I would need to get rid some barely used wedding presents in my kitchen cabinet such as the ice cream maker or deep fryer.

Step 8: Bake and Enjoy!

Remove the dutch oven from pre-heating when you are ready to bake.

Remove the lid and carefully transfer the dough to the hot dutch oven. At this point you can score the bread in any pattern you choose.

Cook the bread in the dutch oven at 450 degrees with the lid on for 30 minutes, then another 15 minutes with the lid off.

Step 9: Care and Feeding for the Starter

This is what my starter looks like after 24 hours in the refrigerator. You see that some bubbles have formed. I will store it for up to a week in the refrigerator and I remove it 2-4 hours before using it for my next loaf. If you do not have time to bake, then you can feed the starter without baking a loaf:

  • Dump most of the mixture in the garbage
  • Add 3/4 cups flour and 4 oz water to the container
  • Mix and cover with plastic wrap or a cloth

After 4-5 feedings the starter takes on increasing complexity and aroma as the originally bakers yeast mixes with the wild yeasts in the air in your house.

Step 10: Variations on the No-knead Bread

Over time I have developed my own recipe that I prefer for no-knead bread, primarily by adjusting the mix of flours for the optimal texture. Adding wheat flour adds a more rustic feel to the bread. Bread flour gives the bread a more chewy texture like a bagel. Higher percentages of all-purpose flour make the crumb and crust more light and refined. The mixture that I prefer is roughly:

  • 50 g wheat flour (which is used in the starter)
  • 100 g bread flour (50g from the starter, and an additional 50 g when you mix the ingredients)
  • 350 g all purpose flour
  • 12 g salt
  • 350-375 g water

And that is it! Thanks for making it to step 10 of this Instructable.

Baking bread is a lifetime learning process. Thanks in advance for any comments or feedback you may have.

Step 11: The Science of Sourdough

This is a good article about the science of sourdough. "The baker's yeast in supermarket bread creates a virtual monoculture of S. cerevisiae. The sourdough bâtard, on the other hand, is a product of natural fermentation involving wild yeasts and bacteria. Almost all the bacteria are lactobacilli, cousins of the bacteria that curdle milk into yogurt and cheese."

When you make a poolish using bakers yeast, the yeast that you grow will be a variety of S. cerevisiae. As you feed your poolish, it will interact with the wild yeasts and bacteria in the air. I have never done an analysis of the composition of my starter over time to understand the percentage of S. cerevisiae vs. lactobacilli. Anecdotally I have noticed that my poolish takes on on more complexity and acidity after about a week of daily feedings, usually by the time the holidays pass and I'm ready to go back to work.

This Instructable should help you learn how to keep a poolish alive and understand the rhythm of maintaining a starter.

The poolish kickstarter method to me is preferred to growing a natural yeast starter from scratch which has taken me 2-3 weeks or more, by which time the holidays are over and I have no more time to bake bread. So whether you call this recipe a poolish or sourdough, you will definitely learn how to use a starter and eat lots of tasty bread in the process. So good luck and let me know how it works out for you!

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    I learned to cook with sourdough over 30 years ago from a master baker in Germany. I say cook because there is so much more to sourdough than bread. There are muffins, cakes, a family favorite, pancakes, and so much more.

    The number 1 lesson she taught, was the thorough washing of hands (use a nail brush) if any "hand" handling was going to occur. It keeps the "ugly" bacteria/microbes from altering the flavor. She had two finished loaves that showed a distinct flavor difference.

    Lesson number 2, never ever use any metal bowls or utensils when working with sourdough. Again, two loaves, a difference both in flavor and texture.

    Just about any recipe that uses a leavener can be converted to sourdough. I have used additives and have not found any that diminish or alter the sourdough note. As I said, pancakes are a favorite, plain, blueberry, apple cinnamon, banana, zucchini, and more. I encourage everyone interested in being a real foodie to explore sourdough.

    Questions

    12 Comments

    I am very sorry but I have to tell you that a "sourdough" bread with even a piece of commercial yeast isn't sourdough anymore.

    I agree with you.

    Would be nice if we could print it out in a nice format as displayed in the "indestructible " display format without upgrading and paying for it. BAH HUMBUG !!!!

    o the same thing for the third night. At that point you will have a good wild sourdough starter.

    By adding normal bread yeast to your flour and water, you are growing bread yeast, not wild sourdough yeast.

    You also don't have to discard any starter. Simply add the extra starter to your bread, and subtract the ingredients in the extra starter from your bread's ingredients as you illustrate.

    Finally, you don't have to feed or discard any of your starter weekly if you don't use it weekly. When you are ready to make bread, simply feed the starter and let it wake up at room temperature for a few hours, and do that process a few times and you will see it start bubbling back to life again. The starter in your refrigerator is full of dormant wild yeast spores just waiting for you to create the perfect conditions for it to jump back to work. This method requires some planning because you may have to start this process a day or two before you want bread, but it works well, and saves flour and water. I doubt that the pioneers threw out half of their starter every week!

    The following should be added to the beginning of my comments above. Instructables screwed it up:

    The way Julia Child did it was to mix 3 T of flour and 3 T of water on a wooden cutting board with her fingers for about a minute, gathering spores from the air, and let it rest over night at room temperature over night, and to do the same thing on the second and third nights.

    Do you feed the starter in 24 hrs? Or after a week? Tks...so happy to have found this as this explains in better detail how one makes a good starter. Other sites say to feed daily....which seems such a waste as one doesn't bake bread daily...usually. Wondering if weekly does it...more doable, obviously.

    That mostly depends on the temperature.
    When you put it in the fridge you can get away with only feeding once a week.


    When you want a bread everyday, keep it on the counter (shade) and feed it every day.

    Thank you so much...no wonder I was having trouble...was feeding it daily. Of course, gave up after a few days and bought yeast. NOW I can try again. You're a doll.

    Nice instructable, I love making bread, but have never tried using a starter. With this information I'm going to give it a shot!

    Excellent! I've been looking for a good starter recipe. And the way you went all the way to the finish with the bread is great too. I'll have to make some; I want to try to use a bread machine for sourdough (yeah, I know--sacrilege). Thanks!