This edible mushroom grows naturally in eastern North America, East Asia, and Central America; it has also been reported in southern France. The flavor of Indigo Milk Caps is supposed to vary more than other mushrooms, depending on the trees they’re associating with, the soil and other aspects of their growing environment. Most commonly the mushroom is noted for its mild, sweet and nutty flavor with a hint of cracked pepper on the finish.

Lactarius Indigo is a species of agaric fungus in the family Russulaceae. It The milk, or latex, that oozes when the mushroom tissue is cut or broken — a feature common to all members of the genus Lactarius — is also indigo blue, but slowly turns green upon exposure to air.

Like all fungus, Lactarius Indigo builds relationships with certain trees. In Mexico, associations have been noted with Mexican alder, American Hornbeam, American Hophornbeam, and Liquidambar macrophylla, while in Guatemala the mushroom associates with smooth-bark Mexican pine and other pine and oak species. In Costa Rica, the species forms associations with several native oaks of the genus Quercus.

You can find a lot of wild foraging blogs featuring Indigo Milk Cap online. People have made vinaigrette's out of them, battered and fried/baked, grilled, & sauteed.