A buff-coloured woodland toadstool with a greasy cap, found in both Eurasia and North America and typically growing in tufts and often in rings.
Collybia butyracea, family Tricholomataceae, class Hymenomycetes.
They sell maitake, shiitake, oyster, lion's mane, chestnut, scallops and butter cap mushrooms in 1/2 pound sacks for $6 and one pound sacks for $10....
Little grilled quails with spring butter caps and giblet sauce.