## 100% sourdough bread from The Taste of Bread by R. Calvel

**Formula for bread made with natural levain**

(French Pain au Levain)

This formula gives very regular and extremely good results, said Calvel. It includes two successive cultures: a refresher culture and a fermented sponge, and thus is termed ‘work from two leavens’. The volume of refresher should reach at least 3.5 times the beginning volume. Add 5% of light rye flour to the second sponge to improve the taste and keeping quality of bread.

**Refreshed Culture**

52g starter

67g flour

40g water

Mix at low speed for 10 min until smooth dough stage. Dough temperature should be 77-79F. Proof for 5-6 hours. In my case, this particular batch, tripled in volume in 3 hours and I proceeded to mixing sponge.

**Sponge **

160g refresher culture

176g flour

15g light rye flour

115g water

Mix on low speed for 10 min until smooth dough stage. Dough temperature should be 77-79F. Proof for 5-6 hours. It will rise to 3.5 times starting volume. Again, it took only 3 hours this time.

**Bread made from a naturally fermented sponge**

465g sponge

1900g flour

100 g light rye flour

1280 g water

35 g salt

4 g fresh yeast (occasionally)

Mix wheat flour and water for 5 min on low speed. Autolyze for 30 min. Knead for 6min on low speed, add salt, yeast (if using), rye flour, and sponge and finish mixing for 6 more minutes. Dough temperature will be 77-78F.

Primary fermentation will take 50 min. Take 10 min for division and rounding of loaves, 30 min for bench time and 10 min for molding. Naturally leavened loaves have better oven spring when shaped in round or slightly oblong loaves.

Proof for 4 hours; loaves will increase in volume 3.5 – 4 times. Oven spring is slower with naturally leavened breads, so it is important to get maximum rise before crust formation. These loaves took exactly 4 hours to quadruple in volume before baking.

Bake at 445F for 30-40 minutes.