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Sourdough Starter or Leaven

This process aims to produce a 500g sourdough starter for use in home baking. You may wish to adjust the quantities to suit you own needs, but if you stick to the relative proportions used here, you shouldn’t have a problem.

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A friend once called sourdough bread “The philosophers stone”. Well he is as obsessed as am I, but there is truth in this. Well-made, sourdough bread is only pleasantly sour and is quite easy, very digestible and a treasure of nutrition. The real secret is in the growth and maintenance of the starter.

Be prepared, it may overtake your life, your partner/family/pets will all desert you as you become more obsessed, however they will eventually return just to eat your delicious bread!

The role of the starter

To make a sourdough bread, the sourdough starter is mixed with more flour, water and salt to make the dough which will then ferment, rise, and can be baked similarly to yeast bread. The starter simply replaces the addition of yeast; the sourdough will rise more slowly, but the process is essentially the same.

About this starter

This process aims to produce a 500g sourdough starter for use in home baking. You may wish to adjust the quantities to suit you own needs, but if you stick to the relative proportions used here, you shouldn’t have a problem.

The process


125g organic wholemeal wheat flour (preferably stoneground)

190g slightly warm water

Use a bowl for the mixing and a glass jar for the permanent home


Day 1

Mix the ingredients well, cover with a cotton tea-towel and place in a draught-free, “not cold” spot in your kitchen. Leave undisturbed until the next morning.

Day 2

In the morning, give the mix a good stir and replace the tea-towel.

Tip - Choose a time which is convenient for you and try attend to your starter at the same time each morning.

Day 3 - 6

Each morning check you starter. When you see a little bubbly activity, things are moving.

If you have bubbles, a slightly sour or acid smell and a pleasant yeasty even “grassy” aroma, your starter is “on the way” and you are ready to move on to the next stage, Growth. This is an important stage and as soon as activity is observed as bubbling or slight froth, move to the growth stage.

If your starter is not “on the way”, stir and walk away until the next day.

Click for more photosTip - These leavens can vary and if you aren’t having success, but get to the first stage of bubbling/frothiness, as an alternative method, add plenty of water(200-250gm/a cup) to the just-active starter and whisk it briskly so that it is well frothy. Pour off most of this mix and add the 125gm of flour or a little more, to make the same thick batter consistency. This should then take 12 hours/overnight to be fully active again. Then proceed as in the directions for growth.

Tip - Activity is more likely to be evident in summer, but in cold climates be patient. If no activity has happened by day 5, it’s a concern; persevere for another day, but you may have to start again.

Photos - if you'd like to see some photos of starters in various stages, click here.


Day 1

Celebrate the arrival of your new life partner!

Add the original Ingredients (125g organic wholemeal wheat flour and 190g slightly warm water) to your starter and stir them in.

Day 2

Next morning, pour off half of your starter. You do not need this half.

Take the remaining half, and refresh it. To refresh your starter add the original  ingredients and stir them in.

Tip - if you can’t bear the waste, thicken the throw-out with some fresh flour and make a pancake as you would a regular pancake, and enjoy your first taste. Alternatively, compost it.

Day 3 - 9

Every day for a week, pour off half of you starter and refresh it.

By this time, which may be as long as 2 weeks after you began, your starter will be nicely active and ready to make the first loaf.

Using a sourdough starter

To make sourdough bread, the starter is used to make the dough. It is the source of the fermentation process that is powered by yeast in modern methods.

Your recipe will tell you how much starter to add to you mix, but always ensure you have at least 2 tablespoons of the original starter left. If you do not keep enough of this “seed”, you risk killing your starter and going back to square one.

Each time you use your starter, you will need to replenish it so that it is ready for your next baking session.

Tip - You should use your starter when it is active. This is usually in the middle of the refresh cycle, when it is good and bubbly. So if you are on a 24 hour refresh and want to bake in the morning, refresh is the evening.

Keeping a sourdough starter

When you use your starter, it is essential that there will be a small amount left, never less than 2 tablespoons. This is the seed.

Each time you bake, you will need to replenish your starter by refreshing your seed. Simply add the initial ingredients (125g organic wholemeal wheat flour and 190g slightly warm water), mix and set aside. Your refreshed starter should be ready for baking 12 hours later.

Storage a sourdough starter

An active starter can be refrigerated for a week, in the jar with a loosely fitting lid. After a week, it should be taken out of the refrigerator, brought back to room temperature and then refreshed to reinvigorate  overnight, or for 12 hours. Then it can be used for bread making and the refreshment schedule repeated.

If you aren’t making bread, simply return it to the refrigerator once it’s refreshed.

Tip - As a commercial baker and fanatic, I never refrigerate the leaven. This ensures it is quick to respond and always highly active. If you bake regularly I recommend not refrigerating it, but refreshing it daily always discarding half, which can be composted or used for pancakes or crumpets. Otherwise, refrigerate…it will work well, but is always slightly sleepy and a little slower.

Tips, comments & trouble shooting


The starter should always have the consistency of a very thick batter when you refresh it. This will thin down as it ferments, and will be more liquid when you use it, but make sure it is a thick batter when you refresh, which these quantities should ensure.


It is ideal to use spring water, but costly. It is true that a bad ferment can be caused by unsuitable water, or simply killed. However, this process works even with tap water, and I use tap water always, but do filter it if I’m baking commercially. Troubleshooting must include trying different water if it's not working.


Similarly, if you aren’t having success, try a different flour. In my experience, stoneground flour makes the best starter. But this doesn’t mean you can’t do it with other flour. Sometimes using Rye flour will initiate the starter more easily and well worth trying if you aren’t having success. Simply follow the directions above, using 100%wholemeal Rye flour. This can then be used for initiating a wheat starter or for direct use.

The effects of temperature

Ambient “room” temperature varies of course with the climate. In Australia at 40 degrees, the starter will go “off” in 12 hours, so the refreshment schedule needs to be adjusted. A friend in Spain told me he does this 2-3 times daily in 40+weather. During an English winter, a warmish spot is  needed for a 24hour cycle. The temperature ideally should be about 25 degrees. It's useful to be vigilant and observe the cycle of your starter, and act accordingly. This attention is what initiates good bread.

Bad smell

If you have tried and have a really unpleasant smell after a few days, throw it away and start again. Believe me it’s not worth persevering with a putrid smelling starter. Next time, perhaps pour boiling water into the receptacle and wash very well before starting again and make sure all the implements are very clean. If the leaven place is too hot, it will cause a bad fermentation, so perhaps move to a cooler spot for the starter.

What do you call it?

What you have made is variously called “the starter”, “the culture”, “the leaven”, “the levain”. It is not “a mother” please read my blog on why. You are of course free to call it “the mother”, but it’s more an American term of abuse or suited to vinegar production.

Added by: NaomiS

Tags: Sourdough

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Sourdough starter

Making my first sourdough starter but my kitchen, like a lot of kitchens can really vary in temperature - warm /hot during the day but much cooler at night. I have a fridge that is built into a cupboard that has a shelf above it, this is a much more stable temperature - Not hot, not even warm but steady. Does the sourdough starter like being in the dark though!?

clare4chocolate 04 May 2020

Sourdough starter

Hi, I am very keen to find a starter recipe that differs from the one I have been using for a couple of years, that recommends putting 2 tablespoons of balsamic vinegar in with strong white bread flour. I will definitely try this recipe and with different flour as described, and give it a go. Thank you.

Mr Charlie Armour 14 April 2020

many thanks for your informative description,. I did my starter with organic wholemeal Spelt flour, and it came out wonderfully. Since I live in a relatively warm country, I must refrigerate it between refreshing times. I am very surprised by the "wildness" of the Spelt starter which bubbles so quickly and makes alcoholic flavored liquid on top, that I have to refresh it every second, third day... or is it normal, and I can wait more days? (I bake 2 loaves of bread once a week) the starter is 2 months old now... thanks!! Sharon

Sharon - ksharonv 27 December 2013

I have been getting it wrong i was using Rye flour, the recipe states using Wholemeal Wheat Flour, as I am new to sourdough I am really confused, now I have read this should it make a difference

kevin christie - Kevin 14 March 2013

Hi, Kevin My first successful sourdough was with 100% organic wholegrain rye. Attempts with other flours failed dismally regardless whose recipe I used. 100% organic wholegrain rye [200g rye, 200ml tepid water] took a couple of weeks to get going properly [refreshing every couple of days]. I later tried using French white wheat flour but this failed. I tried again but with Shipton's organic white flour and the result is fantastic. Keep trying and you'll get there. Sourdough is good but double sourdough [mixing rye and wheat sourdoughs] is even better. The rye is not so good on oven spring. The wheat is not so good on sourness. Put the two together and the result is great! Keep well david

- davidm 08 December 2013

very good description of the process. I have found that adding some sugar at the very beginning helps to initiate the fermentation process. I also only use wml rye flour to make the starter or levain as it rarely ever fails. If making a 'white' or 'wholemeal' sourdough, i use the rye as the starter in a multi-stage process. Also, different temps favour a different fermentation: higher temp favours natural yeast production whilst cooler/fridge temps favour lactic acid bacteria production. I dont particularly like a strong sour flour in 'white' sourdough and so ferment at a higher temp. However, a strong sour flavour compliments a predominantly whole wheat/rye sourdough bread. Regarding the term 'mother' , i prefer the term 'levain' or just sourdough(rye) starter.

surfing69 25 July 2012

measurement of water
Thought the liquid measurement in grammes was a mistake but now know it should be weighed along with the flour, thought others would find this information useful

- vera d 02 January 2012

RE: measurement of water
1ml of water is the same as 1g. The density of water is such that one litre of water weighs one kilo. However, most measuring jugs are very imprecise and so weighing the water is going to be much more accurate that measuring it in a jug.

- davidm 08 December 2013

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