Does anyone know what the science is behind washing mushrooms in water with flour? I took a culinary course and the instructor said it bleaches the mushrooms (if they’re white ones) and acts as an abrasive to remove dirt. Would something with a similar texture to flour (i.e. baking soda or baking powder) do the same thing, or is there something special about flour that makes this technique work?
The instructor wasn’t totally sure. She just said not to leave the mushrooms in the water too long because the acid in baking soda/powder could soften them. I tried looking for more info online but didn’t find much. From what I did read, it sounds like it's a technique that might be common in France.
Thanks for your help!
