Updated October 2026

How to Make Chilli Sauce at Home, Safely

A tested vinegar chilli sauce can be bottled for the cupboard. A fermented sauce cannot, so it lives in the fridge.

If you want chilli sauce that keeps in the pantry, use a tested recipe such as the National Center for Home Food Preservation's cayenne pepper sauce, made with vinegar and processed in boiling water (10 minutes for jars up to 473 ml at up to 300 m above sea level). Fermented chilli sauce is popular and very good, but no food safety agency has a tested method for making it shelf stable at home, so keep it in the fridge and eat it within a few weeks. Chillies are a low-acid vegetable; the acid in the sauce is what makes it safe.

Fermented chilli brine calculator

Enter the weight of stemmed chillies and pick a salt level; the calculator assumes water equal to the chilli weight.

Fermented sauce, kept cold

1. Clean everything. The Food Safety Information Council advises glass or food-grade plastic jars, measured salt, and a trusted recipe's temperature and time. Avoid "back-slopping" (starting with liquid from an old batch).
2. Weigh the salt with the calculator and dissolve it in the water.
3. Pack and cover. Pack stemmed chillies (and garlic or onion if you like) into the jar, pour the brine over and hold everything under with a weight.
4. Ferment somewhere below about 24°C for 1 to 3 weeks, venting the lid daily unless it has an airlock. Above that, vegetables ferment soft and fast; in a Queensland summer use the coolest room you have.
5. Blend, bottle and refrigerate. Blend with some of the brine and vinegar to taste. Keep it in the fridge and use it within a few weeks.

A flat white film is usually harmless yeast and can be skimmed off. Fuzzy, coloured mould, sliminess or a rotten smell means the batch goes in the bin.

Some recipes say to bring a fermented sauce to pH 4.0 with vinegar and store it in the cupboard. That has not been tested for home kitchens, and a home pH reading does not replace a tested recipe's proportions and processing, so we do not recommend it.

Bottled sauce for the cupboard

Use a tested vinegar-based recipe exactly as written: the NCHFP cayenne pepper sauce, its tomato-based easy hot sauce, or tested pickled hot chillies. Do not change the vinegar, the chilli quantity or the jar size. Process in boiling water for the recipe's time and add time for altitude above 300 m.

Handling hot chillies

Wear disposable gloves for anything from habanero up, keep your hands away from your face, and blend superhots with the window open and the lid lifted away from you. Milk or yoghurt soothes a capsaicin burn better than water. Our chilli heat scale compares common varieties.

When chillies glut

In the south, chillies colour up from late summer into autumn. In South East Queensland and the north they crop for many months, and plants often last several years. Freeze ripe chillies whole (wash and stem them first) until you have enough for a batch.

Sources we checked (October 2026): National Center for Home Food Preservation: Cayenne Pepper Sauce, Easy Hot Sauce, Pickled Hot Peppers, Freezing Hot Peppers, General Information on Pickling; Food Safety Information Council, Fermenting food and drink at home; Food Standards Code Standard 2.10.1; CSIRO, Preservation of vegetables and herbs in oil.

Common questions