Fermentation Basics Cheat Sheet

Home fermentation guide. Sauerkraut, kimchi, kombucha, pickles, and fermentation safety for delicious probiotic foods.

Last Updated: December 24, 2025

Fermentation Science

Lacto-fermentation, wild fermentation, beneficial bacteria

2-3% salt by weight for vegetables
Weigh vegetables, multiply by 0.02-0.03 for salt amount
Submerge vegetables completely
Use glass weights or cabbage leaves to keep below brine
Ferment at room temperature 68-75°F
Cooler temps slow fermentation, warmer speeds it up
Burp jars daily first few days
Release CO2 buildup to prevent explosions
Taste test after 3-5 days
Fermentation continues, refrigerate when you like the flavor
White film (kahm yeast) is safe
Skim off surface, not harmful but can affect flavor

Essential Equipment

Jars, weights, airlocks, thermometers, pH strips

2-3% salt by weight for vegetables
Weigh vegetables, multiply by 0.02-0.03 for salt amount
Submerge vegetables completely
Use glass weights or cabbage leaves to keep below brine
Ferment at room temperature 68-75°F
Cooler temps slow fermentation, warmer speeds it up
Burp jars daily first few days
Release CO2 buildup to prevent explosions
Taste test after 3-5 days
Fermentation continues, refrigerate when you like the flavor
White film (kahm yeast) is safe
Skim off surface, not harmful but can affect flavor

Sauerkraut & Kimchi

Cabbage prep, salt ratios, fermentation times

2-3% salt by weight for vegetables
Weigh vegetables, multiply by 0.02-0.03 for salt amount
Submerge vegetables completely
Use glass weights or cabbage leaves to keep below brine
Ferment at room temperature 68-75°F
Cooler temps slow fermentation, warmer speeds it up
Burp jars daily first few days
Release CO2 buildup to prevent explosions
Taste test after 3-5 days
Fermentation continues, refrigerate when you like the flavor
White film (kahm yeast) is safe
Skim off surface, not harmful but can affect flavor

Kombucha

SCOBY care, first fermentation, second fermentation, flavoring

2-3% salt by weight for vegetables
Weigh vegetables, multiply by 0.02-0.03 for salt amount
Submerge vegetables completely
Use glass weights or cabbage leaves to keep below brine
Ferment at room temperature 68-75°F
Cooler temps slow fermentation, warmer speeds it up
Burp jars daily first few days
Release CO2 buildup to prevent explosions
Taste test after 3-5 days
Fermentation continues, refrigerate when you like the flavor
White film (kahm yeast) is safe
Skim off surface, not harmful but can affect flavor

Quick Pickles

Cucumbers, carrots, onions, brine ratios

2-3% salt by weight for vegetables
Weigh vegetables, multiply by 0.02-0.03 for salt amount
Submerge vegetables completely
Use glass weights or cabbage leaves to keep below brine
Ferment at room temperature 68-75°F
Cooler temps slow fermentation, warmer speeds it up
Burp jars daily first few days
Release CO2 buildup to prevent explosions
Taste test after 3-5 days
Fermentation continues, refrigerate when you like the flavor
White film (kahm yeast) is safe
Skim off surface, not harmful but can affect flavor

Safety & Storage

Identifying spoilage, pH testing, refrigeration, shelf life

2-3% salt by weight for vegetables
Weigh vegetables, multiply by 0.02-0.03 for salt amount
Submerge vegetables completely
Use glass weights or cabbage leaves to keep below brine
Ferment at room temperature 68-75°F
Cooler temps slow fermentation, warmer speeds it up
Burp jars daily first few days
Release CO2 buildup to prevent explosions
Taste test after 3-5 days
Fermentation continues, refrigerate when you like the flavor
White film (kahm yeast) is safe
Skim off surface, not harmful but can affect flavor
💡 Pro Tip: Master the fundamentals first before moving to advanced techniques. Practice regularly and refer to this cheatsheet for quick reference.
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