FWSY 80% biga

FWSY 80% biga

This was my first attempt at the FWSY 80% biga. As usual I made the dough using 25% whole wheat, I reduced the water temperature given the temperature of my apartment, and slightly reduced the proofing time. Given the lack of oven spring and tighter crumb structure, maybe I should reduce the proof time further? It tasted good, but definitely room for improvement. Is a good rule of thumbs for FWSY to end the bulk ferment when the dough is 2x the original volume?