Kahm

Kahm or Kahm yeast is a layer of wild yeast which tends to form on fermented foods such as sauerkraut. It is typically harmless but the smell and appearance tends to spoil the food. The yeast genera which form these films include Debaryomyces, Mycoderma and Pichia.[1][2][3]

The word kahm in German means dust, dirt or mould.

See also
  • Flor – a layer of yeast which forms on the surface of wine
  • Pellicle (cooking) – a skin which develops in smoked foods

References
  1. What is kahm yeast?
  2. Preventing kahm yeast and mold in fermentation
  3. What is Kahm Yeast, and What Does Kahm Do?
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