 Although L. indigo is a well @-@ known edible species , opinions vary on its <unk> . For example , American mycologist David Arora considers it a " superior edible " , while a field guide on Kansas fungi rates it as " mediocre in quality " . It may have a slightly bitter , or <unk> taste , and has a coarse , <unk> texture . The firm flesh is best prepared by cutting the mushroom in thin <unk> . The blue color disappears with cooking , and the mushroom becomes grayish . Because of the <unk> texture of the flesh , it does not lend itself well to drying . Specimens producing copious quantities of milk may be used to add color to <unk> . 
