How to Make Apple Cider Vinegar: Complete Homemade Guide

Save cores and peels whenever you're baking, cooking, or simply eating apples, collecting them in a bag in the freezer until you have enough (roughly 2-3 cups of scraps) for a batch.

Alternatively, use whole apples, particularly ones that are slightly past their prime for fresh eating but not actually spoiled, chopped into rough pieces including the core.

Organic apples are often preferred by vinegar makers, since conventional apples may carry a coating or residue that some believe could inhibit the wild yeast fermentation process, though this concern is debated among home fermenters.

Wash apples or scraps thoroughly if using conventionally grown produce, removing any visible dirt while understanding you're not trying to sterilize them, since the wild yeast present on apple skins is actually beneficial for this process.

Avoid using any apples or scraps showing mold or significant rot, since starting with compromised produce increases the risk of an unsuccessful or off-flavored batch.

Pack apple scraps or chopped apples into a large glass jar, filling it about two-thirds full to leave room for the liquid and some expansion during active fermentation.

Dissolve 1-2 tablespoons of sugar per cup of filtered water, then pour this sugar water over the apples until they're fully submerged, since sugar is the initial food source the wild yeast needs to begin converting into alcohol.

Use a weight, such as a smaller jar or a fermentation weight, to keep the apple pieces submerged beneath the liquid surface, since exposed pieces are prone to mold growth rather than proper fermentation.

Cover the jar with a breathable cloth secured by a rubber band, which allows air circulation (both fermentation stages of this process are aerobic) while keeping out fruit flies and debris.

Place the jar in a location maintaining 60-80°F, away from direct sunlight, since consistent moderate temperature supports healthy fermentation without the stress temperature extremes can cause.

Stir the mixture daily for the first week, which helps distribute the wild yeast and prevents any surface mold from establishing on exposed pieces or liquid surface.

You should notice bubbling activity and a slightly fizzy, alcoholic smell developing within a few days to a week, confirming the wild yeast is actively converting sugars into alcohol.

This first stage, essentially creating a rough hard cider, typically takes 2-3 weeks, though timing varies based on temperature and the specific wild yeast population present on your particular apples.

Strain out the solid apple pieces once this first stage is complete, using a fine mesh strainer, then return the strained liquid to the jar (or a clean jar) for the second fermentation stage to follow.

The liquid at this stage will taste alcoholic and somewhat like a rough, unrefined hard cider rather than vinegar, which is completely expected and normal at this point in the process.

Return the strained liquid to your jar, re-cover with the breathable cloth, and let it continue fermenting undisturbed, since acetobacter bacteria (naturally present in the air and on the apples) now take over, converting the alcohol into acetic acid.

You'll typically notice a cloudy, web-like substance forming on the surface or throughout the liquid over the following weeks, called the 'mother,' which is a visible colony of the beneficial bacteria doing the acetic acid conversion.

This second stage generally takes an additional 3-6 weeks, considerably longer than the first stage, since converting alcohol to acetic acid is a slower biological process than the initial sugar-to-alcohol fermentation.

Begin taste-testing around week 4 of this second stage using a clean spoon, checking for the tangy, sour vinegar flavor developing, continuing to test periodically until it reaches your desired strength and acidity.

The mother that forms is completely normal and a sign of healthy, active fermentation; it's edible and can even be saved to jumpstart future batches, working similarly to how a SCOBY functions in kombucha brewing.

Once the vinegar tastes appropriately tangy and vinegar-like to your preference, strain out the mother (setting it aside if you want to save it for future batches) and any remaining sediment using a fine mesh strainer or cheesecloth.

Pour finished vinegar into clean glass bottles, leaving them uncapped or loosely covered for a few more days if you want fermentation to continue slightly, or seal tightly if you're satisfied with the current strength.

Store finished vinegar at room temperature in a pantry or cupboard, similar to store-bought vinegar, since the acidic environment is naturally self-preserving and doesn't require refrigeration.

Raw, unfiltered apple cider vinegar may continue developing a mother over time even after bottling, which is harmless and can simply be strained out again if it forms, or left in for those who prefer the traditional, unfiltered appearance.

Label bottles with the completion date, and note the batch's approximate strength if you tested it, which helps you replicate successful batches or adjust timing in future rounds.

Save a portion of mother or finished vinegar from each batch as a starter for your next one, which introduces an established acetobacter culture that can speed up the acetic fermentation stage considerably compared to relying entirely on wild bacteria each time.

Adding this reserved starter liquid to a fresh batch of hard cider (from the first fermentation stage) can reduce the second stage's timeline meaningfully, since the culture doesn't need to establish itself from scratch.

Consider maintaining a continuous 'mother jar,' similar to a sourdough starter or kombucha SCOBY hotel, feeding it periodically with fresh apple scraps and sugar water to keep the culture healthy and ready for your next batch.

Share extra mother cultures with friends interested in starting their own vinegar-making practice, since a healthy, actively fermenting mother typically produces more material than a single household needs for personal use.

Use your homemade vinegar in salad dressings, marinades, and other culinary applications exactly as you would store-bought apple cider vinegar, adjusting quantities to taste since homemade batches can vary somewhat in strength.

Homemade vinegar works well for pickling and other food preservation projects, though for shelf-stable canning specifically requiring a guaranteed acidity level, commercial vinegar with standardized, tested acidity remains the safer choice.

Diluted homemade vinegar makes an effective natural cleaning solution for various household surfaces, taking advantage of its acidity for general cleaning tasks around the kitchen and bathroom.

Some people use apple cider vinegar for hair rinses, skin toning, or other personal care applications, though these uses are based on traditional practice rather than rigorously established scientific evidence.