Cider apple
Cuir d’âne
A very low-acid French cider apple with substantial phenolics, whose name — “donkey’s hide” — describes the russeted, leathery skin.
Also written Cuir d’Ane, Cuir dane.
- Classification
- Not classified under any recorded system
- Harvest
- Mid (Late September to mid October)
- Single varietal
- Rarely bottled on its own
- Blend role
- Bittersweet base, Tannin and structure
- Origin
- France
- Species
- Malus domestica
- Vigour
- Vigorous
- Biennial bearing
- Slightly biennial
- Keeping
- Moderate
How it is classified
CiderHQ holds no French family classification for Cuir d’âne, and the reason is evidential rather than geographic. The French scheme is defined on acidity thresholds stated in grams per litre — douce below 4.5, acidulée to 6.75, aigre above — and the dataset that measures this cultivar publishes an acidity column whose unit it does not name. Under one of the two conventions in use the fruit falls on one side of a threshold and under the other it falls on the opposite side. Publishing a class would mean publishing a guess, so the measurement is published and the label is not.
What it contributes to a blend
A direction, not a measurement. These bands are the level of resolution the evidence supports, and they say which way adding this fruit pushes a blend rather than what the finished cider will be.
| Axis | Typical | Range |
|---|---|---|
| Acid | Low | |
| Tannin | Firm | |
| Sugar | Moderate | |
| Bitterness | Marked | |
| Astringency | Drying | |
| Aroma | Present | |
| Body | Full |
A 2018 IFPC analysis: 2.3 g/L malic acid, pH 4.1, 989 mg/L total polyphenols, specific gravity 1.049.
Low acid with a real phenolic load, giving a soft, drying juice of modest sugar.
Aroma
No aroma descriptors are recorded for Cuir d’âne, and for a great deal of cider fruit that is a finding rather than a gap. Bittersweet apples in particular contribute tannin, sugar and body while being close to aromatically mute, and most of what a cider made from them smells of was produced by the fermentation rather than carried in by the fruit. CiderHQ publishes the absence rather than filling the space with descriptors nothing supports.
Measured analysis
Each figure is shown with where and when it was taken. They are not averaged: the same cultivar grown in another climate genuinely gives different numbers, and collapsing them into one would be the most misleading thing this page could do.
Malic acid2.3 g/L
France — orchards supplying the IFPC cider-apple juice characterisation, 2018 · Reported as malic acid. Single-season characterisation of twelve varieties chosen as recent or commonly planted. · Institut Français des Productions Cidricoles (IFPC)
The dominant acid in apple and pear juice, and the one that tastes sharp. Measured in grams per litre.
Specific gravity1.049 SG
France — orchards supplying the IFPC cider-apple juice characterisation, 2018 · Published as density in grams per litre (masse volumique) and stored here as specific gravity by exact division; no temperature correction is stated by the source. · Institut Français des Productions Cidricoles (IFPC)
Juice density, the practical proxy for sugar before fermentation. Measured in specific gravity.
pH4.10 pH
France — orchards supplying the IFPC cider-apple juice characterisation, 2018 · Meter on pressed juice. · Institut Français des Productions Cidricoles (IFPC)
Acid strength, which governs microbial risk and sulphite effectiveness. Measured in ph.
Total phenolics989.1 mg/L
France — orchards supplying the IFPC cider-apple juice characterisation, 2018 · Total polyphenols; the presentation does not name the assay, though the magnitudes are consistent with Folin–Ciocalteu. · Institut Français des Productions Cidricoles (IFPC)
The assay is not named by the source. Compare with other French figures rather than with a permanganate tannin figure.
All phenolic compounds together, usually reported as gallic acid equivalents. Measured in milligrams per litre.
Compare within a study to see where these figures sat among the other cultivars the same work analysed — which is a more robust statement than the figures themselves, because absolute values move between laboratories and the ordering inside one study mostly survives.
Watched in the orchard
What named research programmes recorded about this fruit at their own sites. Bloom, harvest and cropping belong to a place and a run of seasons rather than to a cultivar, so they are reported site by site rather than merged.
IFPC cider apple juice characterisation
France — orchards supplying the Institut Français des Productions Cidricoles · 2018 · Institut Français des Productions Cidricoles (IFPC)
Northern French cider country, chiefly Normandy and Brittany: maritime, mild, wet, and the closest continental analogue to the English West Country. The source does not break the samples down by orchard, so the location here is as precise as the evidence allows.
- Held as
- Listed as “Cuir d’âne”
- Total acidity, published as A “total acidity” column, ranging 0.9 to 9.1 across the twelve varieties. The source does not state the unit. The French convention expresses total acidity as sulphuric acid, which would put it at 0.73 times the malic figure; the printed ratio is nearer 0.45 to 0.55, which matches neither that convention nor a malic one. Rather than guess a unit and publish a number in it, CiderHQ publishes the malic acid figure the source does label and records this column as unusable.
Twelve varieties, one harvest. Malic acid, total acidity, density, pH and total polyphenols measured on pressed juice; sensory profiling run alongside on the same juices. The assay behind the polyphenol column is not named, and the unit behind the total acidity column is not stated.
In the orchard
- Harvest window
- Mid
- Flowering
- Not recorded
- Vigour
- Vigorous
- Cropping
- Slightly biennial
- Keeping
- Moderate
Not recorded. The dataset that measures this cultivar reports composition rather than picking dates.
Not recorded in any source CiderHQ has verified.
Juice and pressing
- Very low acid at 2.3 g/L malic
- pH 4.1 — high, and a real microbiological consideration
- Total polyphenols of 989 mg/L
- The lowest gravity of the twelve varieties in its dataset, at 1.049
How it is used
- Blended for phenolics in a French cider must.
On its own
Rarely bottled on its own
A juice at 2.3 g/L acid and pH 4.1 has almost nothing holding it up and sits where the microbiology is least forgiving.
About Cuir d’âne
Cuir d’âne — donkey’s hide — is named for its skin, which is russeted, dull and leathery. The French cider institute measured it in 2018 among twelve varieties chosen as recent or commonly planted, and found 2.3 grams per litre of malic acid, a pH of 4.1, 989 milligrams per litre of total polyphenols, and a specific gravity of 1.049, the lowest sugar in that set.
That combination — very little acid, real phenolic weight, not much sugar — is a blending profile rather than a cider. The high pH is the part a maker has to plan around: sulphur dioxide is far less effective above pH 3.8, and a must built largely on fruit like this needs either an acid partner or a deliberate decision about how it will be protected.
CiderHQ asserts no French family classification for this cultivar, and the reason is worth stating. The dataset publishes malic acid and a second acidity column whose unit it does not name; the French thresholds are stated in grams per litre, and whether they refer to malic acid or to the sulphuric acid convention changes which side of the douce/acidulée line several of these varieties fall. Rather than pick a convention and publish a class derived from the guess, the site publishes the acid figure it can label and leaves the class unstated.
Names, origin and identity
Cultivar naming is the hardest problem in cider fruit data. The same tree carries different names across ten miles, and two different trees have shared a name for two centuries.
Origin · traditional account
A French cider variety carried in the modern planting stock rather than a rediscovered heritage tree. The name describes the skin: russeted, dull and leathery.
Why it matters
- One of twelve French cider varieties characterised by the French cider institute in 2018, which is the only French institutional juice dataset CiderHQ has been able to open.
Related cultivars
Recorded relationships, including the ones this fruit is routinely confused with.
Fruit that plays a similar part
Cultivars sharing a classification under the same system and a comparable role in a blend. Not a similarity score — a stated relationship.
Dabinett
The most widely planted English cider apple: a small, late-ripening bittersweet whose soft, full tannin ferments into a cider that needs almost nothing added to it.
Yarlington Mill
A vigorous Somerset bittersweet, conical and red-striped, giving a cider with more aromatic lift than most of its class and a reputation for fruitiness that the tannin figures do not explain.
Bisquet
A reliable, regular-cropping Norman bittersweet planted heavily in modern orchards precisely because it does not do the one thing most traditional French cider apples do, which is crop every other year.
Chisel Jersey
A hard, high-tannin Somerset bittersweet used in small proportion for structure, and one of the fruit most often reached for when a blend needs backbone rather than bulk.
Ellis Bitter
An early Devon bittersweet, large and conical and deep red, giving good early-season tannin from a tree that crops heavily and unevenly.
Harry Masters’ Jersey
A medium bittersweet from the Yarlington district, valued for tannin that is full without being harsh, and among the more reliable croppers in a class that is generally unreliable.
Where it grows
What people ask next
Questions readers ask about the things this page mentions. Each one goes to the section that answers it rather than to a page written to receive the question.
- How do i balance acid and tannin in a blend — Acid and tannin do different jobs and cannot substitute for each other: acid gives freshness and microbiological safety, tannin gives structure and length. A blend short of acid tastes flabby however tannic it is.
- How do you blend cider
- Why is sulphite added to cider — Sulphur dioxide suppresses spoilage bacteria and wild yeast before fermentation and protects the finished cider from oxidation. How much of it is active depends strongly on pH, which is why low-acid juice is harder to protect.
- What is the difference between french cidre and english cider — French cidre is usually sweeter, weaker and more carbonated, because fermentation is arrested while sugar remains. English cider is more often fermented dry and finished still or lightly sparkling, and is stronger for it.
- What is normandy cider
- What is breton cider
Where to go next
- How cider apples are classified — Why there are four schemes and none of them is universal.
- The blend explorer — See which way changing the proportions moves a blend.
- Blending — What a cider maker is actually deciding when they build a blend.
Sources
What this page rests on. Where a source is marked as registered rather than read, CiderHQ is recording that the body is authoritative on the subject without claiming to have worked through the document itself. See our evidence policy for what each state means.
Caractérisation de jus de pomme à cidre et analyse comparative avec des jus de pomme commerciaux
Institut Français des Productions Cidricoles (IFPC) · research institute · passage verified 2026-08-25 · covers 2018 harvest
A technical-day presentation by the French cider institute, retrieved and read in full on 2026-08-25. Twelve French cider varieties characterised for malic acid, total acidity, density, pH and total polyphenols, with sensory profiling on the same juices. The first French institutional juice figures CiderHQ has been able to open, and important out of proportion to their number because the site holds many French cultivars and previously held almost no French measurements. The total acidity column is not published by CiderHQ: the slide does not state its unit and the ratio to the malic figure matches no convention the site can identify.
Institut Français des Productions Cidricoles (IFPC)
IFPC · research institute · retrieved 2026-08-24
The French technical institute for cider production. The authority for the French cultivar classification families, for keeving as an industrial process, and for the pectin and nitrogen chemistry that keeving depends on.
Research Evidence standard for this record. What that means.