How to Make Garlic chili oil
Fermented garlic chili oil combines lacto-fermented chilies and garlic with oil, creating a complex, tangy, spicy condiment with depth that fresh chili oil cannot match.
Category: Condiments & Sauces · Method: Lactic Acid · Time: 7-21d · Difficulty: 2/5 · Yield: varies · Temp: 18-22°C
History
Chili oils are staples across Asian cuisines. Fermenting the aromatics before infusing adds another dimension, a technique that has gained popularity with the modern fermentation revival.
Ingredients
- 250g Fresh chilies — Stems removed, finely chopped or pulsed into a mash
- 125g Garlic — Peeled and minced
- 2.5% - 3% by weight Sea Salt — Calculate based on the combined weight of chilies and garlic (approx. 10-11g)
- 500ml Neutral oil — Grapeseed, sunflower, or refined peanut oil
Equipment
- Glass jar
- Fermentation weight
- Saucepan
- Strainer (optional)
Instructions
Prepare and Weigh Mash
Combine chopped chilies and garlic. Weigh the mixture and calculate 3% salt by weight. Thoroughly mix in the salt to draw out moisture and create a self-brining mash.
Time: 15 min
Tip: Wear gloves when handling chilies to avoid skin irritation.
Primary Fermentation
Pack the mash tightly into a fermentation jar, pressing down to ensure the liquid (brine) rises above the solids. Place a fermentation weight on top to keep all solids submerged. Seal with an airlock.
Time: 14-21 days
Tip: Garlic requires a longer fermentation period to ensure the pH drops sufficiently. Maintain a temperature of 18-22°C.
Safety pH Check
Before adding oil, test the pH of the fermented mash using a calibrated pH meter or high-precision strips. The pH MUST be 4.6 or lower (ideally 4.0-4.2) to inhibit Clostridium botulinum growth.
Time: 5 min
Tip: If pH is above 4.6, continue fermenting for another 7 days or add a small amount of 5% acidity vinegar until the threshold is met.
Heat and Infuse
Heat oil to 225°F (107°C). Carefully pour the hot oil over the fermented mash. This temperature stabilizes the mixture and drives off excess moisture, though it will neutralize probiotic bacteria.
Time: 20 min
Tip: The mixture will bubble vigorously as residual moisture evaporates; use a vessel with extra headspace.
Cool and Jar
Allow the oil to cool completely before sealing. This prevents condensation which can lead to mold growth.
Time: 2 hours
Fermentation Timeline
- Day 1-7: Ferment — Chilies and garlic develop tang.
- Day 8: Infuse — Oil absorbs fermented flavors.
- Day 9: Ready — Complex, spicy, tangy oil.
Signs of Success & Spoilage
Good signs
- Tangy aroma
- Bright red color
- Fermented depth
- No mold
Warning signs
- Mold
- Rancid smell
- Cloudy oil (if using wrong oil)
Troubleshooting
- pH too high
- Cause: Insufficient fermentation time or low ambient temperature. Solution: Ferment longer or add a splash of rice vinegar to reach pH 4.6 before adding oil.
- Mold on surface
- Cause: Solids were exposed to oxygen during the 14-21 day period. Solution: Discard the batch. Ensure a fermentation weight is used next time to keep solids submerged.
Storage
Refrigerate only Keeps 1-2 months. Always store in the refrigerator. Use a clean, bone-dry spoon for every serving to prevent introducing moisture or contaminants.
Health Benefits
- Capsaicin
- Allicin (bioavailable)
- Antioxidants
- Healthy fats
Serving Suggestions
- Noodles
- Dumplings
- Pizza drizzle
- Eggs
- Stir-fries
Related Condiments & Sauces Ferments
Other Lactic Acid Ferments
- Sauerkraut — Vegetable
- Kimchi — Vegetable
- Kefir — Dairy
- Pickles — Vegetable
- Yogurt — Dairy
- Water Kefir — Beverage
- Kraut-Chi — Vegetable
- Curtido — Vegetables
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