Tricholomopsis decora, commonly known as prunes and custard, is a species of gilled mushroom in the genus Tricholomopsis. It occurs in North America and Britain.
The cap is wide. The gills are mostly adnate. The stem is up to 5.5 cm long and thick. The flesh is yellow and the spore print is white. It is regarded as nonpoisonous.
It resembles T. sulfureoides (and others within its genus), Callistosporium luteo-olivaceum, and Chysomphalina chrysophylla.
It occurs in North America (until October) and in Britain, growing in conifer forests.