Hi Pjaway,
I hand bake all our white, wholemeal, granary and similar breads with a sourdough leaven. I use dried active yeast only for speed and simplicity on things like Bara Brith and Stollen, where the recipe calls for milk as although it can be done with sourdough leaven, it is a bit more difficult.
I always have two leaven starters ready, one white, one rye, hibernating in the refrigerator. The rye one is where I begin, and then make the white from the rye when it is really going well. Try this method if you don't get on with DavidW's link.
In a large, clean non-metallic bowl, using a wooden or plastic spoon, mix together about 50 grams organic, whole rye flour and 50ml boiled and cooled water. Cover and leave to stand for 24 hours in a warm place. The next day take the cover off, add another 50 grams rye flour and 50 ml cooled boiled water, mix in thoroughly, cover and leave to stand for 24 hours. Keep doing the adding of rye flour and water, discarding any fluid which may gather on top of the mix overnight, for at least three or four more days. The mix in the bowl should now look spongy and smell of alcohol and yeast and you should have about 600 or 700 grams of it. What should have happened is that the natural yeasts and things like lactobacteria in the rye flour have used the starch in the flour and produced a fermenting mass. All you have to do now is to feed it to keep it alive by using half to make bread and adding the correct amount of rye flour and water to make up the mass again, leave it to ferment and then store in the refrigerator until needed again. (I use washed out 1kg spread tubs, like Flora or similar, to store mine.)
To use the leaven for white bread, you can make a white starter using a little of the rye starter to kick-start the fermentation. Take about 100 grams of rye leaven and in a clean non-metallic bowl add 50 grams of strong white bread flour and 50 ml of boiled and cooled water. Mix together thoroughly, cover and leave to stand for 24 hours. Remember to top up and feed the rye leaven with 50 grams of rye flour and 50 ml water, leaving to ferment before putting it back in the refrigerator to store. THe next day add another 50 grams of white flour and 50 ml of water to your half and half white/rye bowl, mix, cover and leave to stand. It should develop much more quickly than the original rye starter, as the yeasts and bacteria should be fully active and working before you started. After three or four days of adding 50 grams of white flour and 50 ml of water, you once more should have a spongy, even frothy, bowl of leaven, which you can store and use just like the rye leaven. The first time you use it to make a white loaf, there will be a little of the rye flour in the mix, but if you use half to make a loaf and then make up the leaven with white flour and water, after a few loaves there will be a negligible amount of rye left. You can always put a little clear honey or sugar in the mix to speed up the development, but remember too much will kill the yeasts.
You will need to modify your recipes slightly to use the starters instead of packet yeast. For a large white bloomer I have found the following works well:
1) - Make an overnight dough sponge with 200 grams strong white flour, 300 grams white starter leaven brought back to room temperature, 150 ml warm water with either one teaspoon of demerara sugar or two of runny honey dissolved in it, mixing all together in a non-metallic bowl, covering and leave to stand overnight. It should produce a bubbly sponge mass inside 24 hours. (Remember to feed the starter with white strong flour and water to make the same amount again and ferment and store ready for next time)
2) - Next day - To the overnight sponge add 300 grams of strong white flour, a level teaspoon of sea salt, 15 ml of vegetable oil or 25g melted butter and about 75ml of warm water with another spoonful of sugar or two of honey. (If you like you can add 1/4 teaspoon of vitamin C to the mix, which will improve the rise.) Mix thoroughly, adusting the water or flour amount slightly to get the consistency you prefer. Very importantly, leave the mix to stand for 15 to 20 minutes before you knead it, to let the fresh flour absorb water and the yeasts start to work.
3) - Knead for 10 minutes to get a nice smooth, elastic dough, which should have a silky sheen on its surface which you don't see usually with dried yeasts. Let it rise until doubled, which may take a bit longer than with packet yeasts, then knead again for 5 minutes to get an even bubble structure. Shape to a bloomer, tin(s) or rolls as required, cover and let rise to double again.
4) - Bake in an oven heated to 230C/Gas 7, turned down to 200C/Gas 6 as soon as you put the dough in, for 30-35 minutes for tins or bloomers, 15-20 minutes for rolls.
A similar method can be used for any other type of bread, adjusting the liquid amount in the final mix to allow for the water introduced with the starter. You can use the starters for things like Challah breads, where eggs are an ingredient, but will need to experiment with adjusting the liquid volumes to allow for the volume of the eggs.
PS - (edited to add information) - I was taught this method by my Grandmother when I stayed with her for the summer holidays in 1952, at the age of 7, to keep her company after my Grandfather died. I am still using it and baking all our bread at home, over 57 years later.
Last edited by Dafyddapcennydd (12-01-2010 13:42:36)