Entoloma formosum is an inconspicuous yellowish-brown mushroom in the family Entolomataceae which are distinguished by their pink angular (or similar) spores.

[1] Many Entoloma species are known to be quite difficult to identify, often requiring microscopic analysis or even DNA sequencing.

E. formosum has a depressed brownish cap ranging 10–50 mm (0.4–2.0 in) in width with sometimes fine fibrillose hairs radially arranged.

The stem is up to 100 mm (4 in) in height, and is buff with a darker gradient starting from the bottom.

It can be distinguished from E. formosum by its discolored gill edges and slightly larger spores.