← Moon Dog · Cidermaking Guides
Blending cider: sugar, acid, and tannin
Great cider rarely comes from a single apple. It comes from a blend that balances three properties: sugar (which the yeast turns into alcohol), acid (which gives brightness and freshness), and tannin (which gives body, structure, and a little astringency). Dessert and culinary apples are usually high in sugar and acid but low in tannin — which is why straight supermarket-apple cider often tastes thin.
The four apple classes
The classic Long Ashton system sorts cider apples by acid and tannin:
| Class | Acid | Tannin |
|---|---|---|
| Sharp | high | low |
| Bittersharp | high | high |
| Bittersweet | low | high |
| Sweet | low | low |
A traditional English-style blend leans on bittersweets for tannin and adds sharps for acid. If you only have dessert apples (mostly "sharp/sweet" in character), you can approximate structure with a small tannin addition.
Target acidity
Acid is the easiest of the three to measure and the one most worth dialing in. Titratable acidity (TA), expressed as malic acid, is the working number; a commonly cited balanced range for cider is roughly 0.5–0.7% (about 5–7 g/L). Too low and the cider tastes flat; too high and it's sharp and green. Blend toward the middle, and remember that perceived sharpness also depends on residual sugar and tannin.
Sugar sets your alcohol, not your sweetness (usually). Measure the starting gravity to estimate potential alcohol. If you ferment dry, that sugar becomes alcohol rather than sweetness — so plan the ABV you want before pitching, and decide separately whether you'll back-sweeten and stabilize.
Tannin reads as "drying," sugar masks acid, and cold juice tastes less sharp than warm — so palate impressions mislead. Titrate for TA and check gravity rather than chasing balance blind.
Press balances your blend by the numbers
Enter your apples and readings and Press estimates the blend's sugar, acid, and tannin balance and the resulting ABV — with target ranges drawn from extension cidermaking sources. Free to download.
Sources
- Cornell University hard-cider program (G. Peck) — cider apple chemistry and blending
- University of Vermont Fruit Program (T. Bradshaw) — cider production guidance
Target ranges are guidelines; balance to the style you're after and your own palate.