Wolf's Milk - Lycogala epidendrum

From inaturalist.org:
Lycogala epidendrum, commonly known as wolf's milk, groening's slime is a cosmopolitan species
of plasmodial slime mould which is often mistaken for a fungus. The aethalia, or fruiting bodies,
occur either scattered or in groups on damp rotten wood, especially on large logs, from June to November.