This past week saw several new experiments in my bread laboratory. Okay, it’s a kitchen, but sometimes it feels like a lab, what with all the tinkering and testing I do. I just can’t seem to stop trying new things in bread. It would fee even more science-like if Susan would let me buy the implements and tools I want.
First, however, the good news: my levain remains thriving and healthy. I have two batches now: one on the counter, the other in the fridge. The counter batch is used as a poolish right now; the fridge is the long-term colony.
I used most of the counter colony last week to make a mixed-yeast bread, based somewhat on a recipe in Peter Reinhart’s book, Artisan Breads Every Day. I’ve since restored the levain to fuller size by feeding, and will use it again this week for another mixed-yeast loaf; this one with some tweaks.
You can read some of Reinhart’s ideas about bread, poolish, hydration and cold fermentation here in this PDF file. Or check his blog for ideas and new recipes. I really enjoy Reinhart’s writing and recommend his books. There’s always something to learn in them.
The idea of mixing the two yeasts intrigued me. I’ve learned a lot about pore-ferments and cold fermentation since I started baking. Reinhart writes:
The use of old dough or pre-fermented sponges was developed by traditional bakers as a way of slowing down fermentation and, essentially, buying the dough more time to release its flavor (a result of starch molecules releasing some of their sugar and saccharide chains, as well as the formation of acids due to fermentation by yeast and bacteria). Some of these pre-ferments are wet and batterlike, while others are dry and firm; some are made with commercial yeast, while others use naturally occurring wild yeast (sourdough starters); some have salt, and some don’t. What they all have in common is the idea of adding older, slowly fermented dough to young, freshly made dough to instantly age it so that greater flavor can be developed in less time. This is an example of the manipulation of time by the manipulation of ingredients.