Sourdough Starter Black Spots

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Hi All! I tried to make a sourdough starter, and after 24 hours I uncovered it and discovered black spots and 2 white fluffy areas. The black spots are only at the top layer so can I still use it after removing this layer?

Best Answer

I would discard this batch, carefully clean everything and start over.

If you truly mixed well in the beginning, then the fluffy bits are probably mold and the black spots are somewhat fishy as well. After only 24 hours, you won’t have a strong culture going under that top layer and the mold problem will likely continue. Remember that a sourdough means that the desired yeasts and bacteria grew faster than the unwanted ones and that they create an environment where they can outcompete possible intruders. While a mature starter with problems can be salvaged by using just a bit from an unaffected area, this is not true for fresh flour and water mixes.

If you start over now, you won’t have lost much: a day and a cup of flour perhaps?

Not part of your question but perhaps helpful:
The amount of yeasts is greatest on wholegrain flour - it may be worth it to get a small bag from your local organic store. For upkeep / later feeding, white flour is fine.

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Quick Answer about "Sourdough Starter Black Spots"

A. The dark liquid is a form of naturally occurring alcohol known as hooch, which indicates that your sourdough starter is hungry. Hooch is harmless but should be poured off and discarded prior to stirring and feeding your starter.

Can sourdough starter go moldy?

While mold on a sourdough starter is fairly rare, it does happen from time to time. The cause is usually some sort of contamination with food or soap residue, or weakened yeast due to a forgotten feeding.

How do I know if my sourdough starter is ruined?

You can tell that a sourdough starter is bad or dead if it doesn't respond to regular feedings after being unfed for a long time or if they develop any kind of mold or discoloration.

What is the GREY stuff on my sourdough starter?

Hooch is a runny liquid that ranges in color. It can be clear, brown, grey or even black. Usually, the longer the hooch has been left, the darker the liquid will become. A starter with hooch on the top simply means the starter is hungry for more flour.

What's the black liquid on my starter?

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