Cider is made from pressed apple juice, and in its simplest form, that’s the only ingredient. Non-alcoholic cider (sometimes called “sweet cider”) is raw, unfiltered apple juice with pulp still suspended in it. Hard cider adds one more element: yeast, which ferments the apple sugars into alcohol. Everything else, from sugar to sulfites to clarifying agents, is optional.
The Difference Between Cider, Hard Cider, and Apple Juice
These three drinks all start the same way: fresh apples go into a press, and juice comes out. What happens next determines which product you end up with. Apple cider is that juice left in its natural state, unfiltered and usually unpasteurized, with fine particles of pulp still floating in it. It looks cloudy and tastes like fresh apples with more complexity than you’d get from a clear juice. Massachusetts law defines it specifically as “raw apple juice that has not undergone a filtration process to remove coarse particles of pulp or sediment.”
Apple juice, by contrast, is filtered until clear, pasteurized for shelf stability, often sweetened, and typically contains preservatives. Hard cider takes fresh apple juice and ferments it with yeast, converting the natural sugars into alcohol and carbon dioxide. The alcohol content in hard cider ranges widely, from about 1.2% to 8.5% in traditional English styles, and up to 12% in some continental European versions. In Canada, anything labeled “cider” must fall between 2.5% and 13% alcohol by volume.
Which Apples Go Into Cider
Not all apples make good cider. The ones you eat as snacks (Fuji, Gala, Honeycrisp) are called dessert apples, and while they work in a pinch, dedicated cider apples bring far more complexity. A classification system developed at the Long Ashton Research Station in the U.K. divides cider apples into four categories based on their acid and tannin levels:
- Sweet apples are low in both acid and tannin. They contribute sugar, which translates to higher alcohol content after fermentation.
- Sharp apples are high in acid but low in tannin. They bring brightness and tartness, mostly from malic acid.
- Bittersweet apples are high in tannin but low in acid. They give cider its body, structure, and that dry, slightly astringent mouthfeel.
- Bittersharp apples are high in both. They add tannin and acidity together, creating depth and stability over time.
Most serious cidermakers blend several types to balance sweetness, tartness, and tannin. Cider apple varieties also contain significantly more polyphenols (protective plant compounds) than common dessert apples like Golden Delicious. Depending on the variety, polyphenol concentrations range from 1 to 7 grams per kilogram of fresh fruit, with bitter varieties packing the most. The dominant polyphenols are procyanidins, built from smaller compounds called epicatechin and catechin, which contribute to both the flavor and the antioxidant profile of the finished drink.
How Yeast Turns Juice Into Alcohol
Fermentation is where cider transforms from juice into an alcoholic drink. Yeast cells consume the natural sugars in the apple juice and produce two main byproducts: ethanol (alcohol) and carbon dioxide. This is the same basic process behind beer and wine.
But alcohol isn’t the only thing yeast creates. During fermentation, yeast produces dozens of secondary compounds that shape the flavor. Esters give cider its fruity and floral notes, with one called ethyl acetate making up as much as 90% of the total ester content. Higher alcohols contribute subtle background flavors, while phenolic compounds can add interesting or occasionally unpleasant aromas depending on the yeast strain and conditions.
Most cidermakers use wine yeast, with popular dry strains like Lalvin 71B or Red Star Côte des Blancs doing the job affordably. Some producers opt for wild yeast strains or bacteria to create funkier, more complex flavors. After the primary fermentation finishes, many ciders go through a second stage called malolactic fermentation. Bacteria convert the sharp malic acid (the same acid that gives green apples their bite) into softer lactic acid and carbon dioxide. This creates a rounder, smoother mouthfeel in the finished cider.
Common Additives and Processing Aids
Beyond apples and yeast, commercial ciders often contain a handful of other ingredients. Sugar or honey is sometimes added before fermentation to boost alcohol content, or after fermentation to sweeten the final product. Sulfur dioxide (sulfites) acts as a preservative and antimicrobial agent, and it works best when the juice’s pH sits at 3.8 or lower. Some ciders list potassium sorbate or sodium benzoate as preservatives, though these same chemicals will prevent fermentation if present in juice you’re trying to ferment at home.
Cidermakers also use fining agents to clarify the liquid before bottling. These are substances that bind to suspended particles and pull them to the bottom, leaving clear cider above. Common options include bentonite (a type of clay), egg whites, and isinglass, a protein extracted from fish swim bladders. Egg whites are known for softening astringency without stripping flavor, while isinglass works as a gentle final polish, best used just before bottling on cider that’s already mostly clear. These agents settle out and are removed, so they don’t remain in the finished product in meaningful amounts, but they’re worth knowing about if you have allergies to eggs or fish.
Calories and Sugar in Hard Cider
Hard cider’s nutritional profile varies enormously depending on how much residual sugar the cidermaker leaves behind. A dry cider ferments nearly all its sugar into alcohol, leaving as little as 1 gram of sugar per 12-ounce serving and around 140 calories. A sweet commercial cider can contain 20 to 24 grams of sugar in the same serving size, pushing calories up to 180 or 210.
To put that in perspective, a dry cider has roughly the same sugar as a glass of water with a splash of juice, while a sweet one rivals a can of soda. Mid-range ciders typically land between 7 and 14 grams of sugar per serving, with calories hovering around 140 to 160. If sugar content matters to you, the label is your best guide, since the cider’s sweetness level isn’t always obvious from the brand name or packaging.
Making Cider at Home
Homemade hard cider requires surprisingly little. The basic recipe calls for five gallons of fresh apple juice (with no preservatives) and two packets of dry wine yeast. The juice can come from a local orchard’s cider press or even from grocery store apple juice, as long as the label doesn’t list sodium benzoate or potassium sorbate. Unpasteurized cider from a local source tends to produce the best flavor, since pasteurization alters the juice’s character.
The yeast goes into the juice, fermentation begins within a day or two, and the process runs its course over several weeks. The result is a simple, dry hard cider. From there, you can back-sweeten it, carbonate it, or blend in other fruit juices. The core of cider, though, remains what it has always been: apples, crushed and transformed.