 The fruit bodies have a black to grayish @-@ brown cap that measures up to 15 cm ( 5 @.@ 9 in ) in diameter . The caps of young specimens have a velvety texture and are covered with a whitish to gray powdery coating ; this texture and coating is gradually lost as the mushroom matures , and the cap often develops cracks . The pores on the underside of the cap are small and pinkish . The stem is bluish @-@ purple to black , and measures up to 10 cm ( 3 @.@ 9 in ) long by 4 cm ( 1 @.@ 6 in ) thick . Both the pore surface and the whitish cap flesh will stain pink to reddish @-@ gray , and eventually turn black after being cut or injured . The mushroom is edible , and generally considered one of the best edible Tylopilus species . 
