Witches' butter (or Witch's butter) may refer to:
* ''
Exidia nigricans'', a black, gelatinous fungus
* ''
Exidia glandulosa'', a black, gelatinous fungus
* ''
Tremella mesenterica'', a yellow, gelatinous fungus
* ''
Dacrymyces
''Dacrymyces'' is a genus of fungi in the family Dacrymycetaceae. Species are saprotrophs and occur on dead wood. Their distribution is worldwide. Basidiocarps (fruit bodies) are ceraceous to gelatinous, often yellow to orange, and typically dis ...
'', a jelly fungus often confused with ''Tremella''
* ''
Nostoc
''Nostoc'', also known as star jelly, troll’s butter, spit of moon, fallen star, witch's butter (not to be confused with the fungi commonly known as witches' butter), and witch’s jelly, is the most common genus of cyanobacteria found in vari ...
'', a genus of gelatinous cyanobacteria
{{Fungus common name