Lacto-Fermented Hot Sauce
This is a preservation method that rewards patience. By keeping the mash away from oxygen, you develop a distinctive tang that raw vinegar-based sauces cannot replicate.
Control the environment
Cleanliness is your primary tool. Ensure all vessels are sanitized so that the beneficial lactobacilli can colonize the brine without competition from mold.
- glass mason jar with airlock or loose lid
- digital scale
- blender or food processor
- small glass weight
What goes in.
- 1 lbfresh chili peppers (habaneros, serranos, or jalapeños)
- 4 clovesgarlic, smashed
- 3% of total weightfine sea salt (non-iodized)
- as neededfiltered water
Calculate by Weight
Weigh your peppers and garlic, then multiply that total by 0.03 to determine the exact amount of salt needed. Measuring by volume leads to inconsistency and risks spoilage.
The method.
Prepare the mash
Roughly chop the peppers and garlic. Place them in a glass jar and add the measured salt. Massage the salt into the peppers until they begin to release their own juices.
Pack the jar
Press the mash down firmly to eliminate air pockets. If the released liquid does not cover the peppers entirely, top off with a 3% salt brine (3g salt per 100ml water).
Submerge
Place a glass weight or a small ziptop bag filled with brine on top to keep all solids submerged. If a piece of pepper floats above the brine, it will grow mold.
Ferment
Store in a cool, dark place for 14 to 21 days. If using a standard lid, 'burp' the jar daily to release CO2 buildup.
Blend and strain
Once the ferment smells sharp and sour, blend the contents until smooth. Strain through a fine-mesh sieve if you prefer a thin, commercial-style sauce.
When it doesn't go to plan.
Use non-iodized salt, as iodine can inhibit the growth of beneficial bacteria.
The sauce will continue to develop flavor in the refrigerator; it does not stop fermenting entirely, only slows down.
If you see a thin, white powdery film on the surface, this is likely kahm yeast; it is harmless but can affect the flavor, so skim it off.
The ones that keep coming up.
How do I know if it has gone bad?
Fermented peppers should smell pleasantly sour and pungent. If you see fuzzy, multicolored mold or notice a putrid, rotten odor, discard the batch entirely.
Can I add vinegar?
Yes. Once fermentation is complete, you can stir in a splash of apple cider or white vinegar to adjust the pH and add a different brightness, though the lactic acid is usually sufficient.
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