Nunez de Prado Olive Oil: What Flor de Aceite Actually Is
Nunez de Prado olive oil occupies an unusual position: a producer romantic enough to be written about constantly, and specific enough that most of what gets written can be checked. The centre of it is flor de aceite — "flower of the oil" — which sounds like marketing and turns out to be a precise description of a mechanical process. This article goes through what the family actually publishes about that process, the yield figure they put beside it, the cultivars involved, and where the Baena denomination's own rulebook differs from the summary on their site.
For our own oil, see our cold-pressed organic Marrakech olive oil.
The Short Answer
- Nunez de Prado Oliva Virgen S.L. is a family producer in Baena, Cordoba, listed as a registered member firm by the Denominacion de Origen Baena's own regulatory council. The family arrived in Baena from La Rioja in 1795.
- Flor de aceite is free-run oil: the small quantity of juice that separates under gravity alone, drop by drop through a fine mesh, before any pressing takes place.
- The family publishes the yield this costs them — "a little more than eleven kilos of olives" for one litre. That is the figure on their own product page, not a number in circulation.
- Both their lines come from four cultivars: Picuda, Picual, Hojiblanca and Arbequina. Olives are taken from the tree only, never from the ground, in November and December.
- They describe both oils as organic extra virgin, but publish no acidity, peroxide, polyphenol or K-coefficient figure anywhere we could find — which is the category norm rather than an outlier.
- Sidr & Stone does not publish a polyphenol figure either. We would rather say that plainly than imply one.
Who Nunez de Prado Are
The company trades as Nunez de Prado Oliva Virgen S.L., and the simplest confirmation of its standing is not its own website but the Consejo Regulador of the Denominacion de Origen Baena, which lists it among the registered mills, bottlers and marketers of the denomination.
Their own history page dates the family's arrival in Baena to 1795, from La Rioja in northern Spain. They farmed cereals and vines as well as olives until phylloxera destroyed the vineyards in the late eighteenth century, at which point the family turned decisively towards oil. The mill sits in a traditional Andalusian farmhouse and still contains a cellar of clay tinajas dating from 1795.
That is a genuinely long record, and it is the kind of claim that is easy to verify and easy to inflate. We have stated it as they state it.
How Flor de Aceite Is Actually Made
The process they describe has three distinct stages, and the distinction between them is the whole point.
First, milling. The olives are washed and fed to a stone mill — four conical granite wheels turning on a stone bed, driven by an electric mechanism, crushing the fruit whole including the stone. This is the ancient configuration, and it is slower and gentler than the industrial hammer mills that replaced it almost everywhere else.
Second, the free run. The resulting paste goes into rotating thermo-filters, a technique the family attributes to the marques de Acapulco in the early twentieth century. Their description is explicit: these are devices "designed to extract the oil naturally and without the application of mechanical pressure". The cylinders turn slowly, the oil separates drop by drop under gravity, and a fine metal mesh holds back the solids. What comes through is the flor de aceite — obtained, in their words, without pressure and without thermal alteration, and crucially before the first pressing.
Third, the pressing. Once the free-run oil has been drawn off, the same paste is loaded onto press mats — traditionally woven esparto, now nylon — stacked, and pressed at up to 400 bar. That produces their second product, sold as a cold-pressed oil in tins.
So the two lines are not two grades of the same thing. They are two sequential extractions from one batch of paste.
| Flor de Aceite | Cold-pressed (Presion en Frio) | |
|---|---|---|
| Stage | Before any pressing | After the free-run oil is removed |
| Force used | Gravity only — no mechanical pressure | Hydraulic press, up to 400 bar |
| Equipment | Rotating thermo-filters with fine mesh | Stacked press mats |
| Stated temperature | No thermal alteration | Milled same day, mechanical only, at 21°C |
| Formats | 500 ml glass; 500 ml porcelain | 1, 3 and 5 litre tins |
The Eleven-Kilo Figure, and What It Means
Yield claims are where romantic olive oil stories usually stop being checkable. This one does not. On their Flor de Aceite product page the family state that obtaining one litre by this traditional system requires "a little more than eleven kilos of olives".
Take that seriously for a moment. A conventional mill aims to recover as much oil as the fruit will give, using malaxation and a centrifugal decanter to drive extraction efficiency up. Taking only what runs out under its own weight means deliberately leaving a great deal of oil in the paste — which is precisely why the paste then goes to the press as a separate product. The eleven-kilo figure is not a boast about quality; it is a statement of how much fruit a bottle costs when you refuse to squeeze it.
It is worth flagging one thing, because it is the sort of detail that gets garbled in retelling. A similar number appears elsewhere in their process description — each press mat is loaded with roughly eleven kilos of paste — and the two are unrelated. If you see the figure quoted without "of olives, per litre" attached, treat it with care.
The Cultivars, and What Baena DOP Actually Covers
Both Nunez de Prado lines are made from Picuda, Picual, Hojiblanca and Arbequina, harvested in November and December from the family's own estates. Picuda — also called Picudo or Carrasqueno de Cordoba — is the signature variety of the region; the Consejo Regulador's own history notes that Baena's growers settled on it as the olive best suited to the local soil and climate.
Here it is worth comparing the producer's summary of the denomination with the denomination's own published specification, because they do not match.
| Nunez de Prado's page says | Consejo Regulador's site says | |
|---|---|---|
| Municipalities covered | Baena, Doña Mencia, Nueva Carteya, Zuheros | Albendin, Baena, Cabra, Castro del Rio, Doña Mencia, Luque, Nueva Carteya, Zuheros |
| Principal varieties | Picudo, Picual, Hojiblanca, Arbequina | Picudo, LechÃn, Chorrúo, Pajarero, Hojiblanco, Picual — plus more than twenty minor varieties |
| Established | Described as Spain's oldest | "Since 1981" |
This reads as a simplified or dated summary on the producer's side rather than anything more than that, and we make no suggestion otherwise. But if you are trying to understand what the back-label guarantee actually means, the Consejo's own text is the document to read. It describes its oil as the most multi-varietal extra virgin in the world, and controls quality through laboratory testing and a recognised tasting panel before the numbered back-label is issued.
For the cultivars themselves, our guides to Picual and Hojiblanca go into how each behaves, and our overview of Spanish olive oil covers what a DOP does and does not guarantee.
What They Publish, and What They Don't
Nunez de Prado publish an unusual amount about method. They publish almost nothing about chemistry. Their product pages carry expandable sections for certifications, storage, delivery, tasting notes and serving suggestions — which is exactly where a producer would put analytical figures — and no free acidity, peroxide value, polyphenol count or K-coefficient appears in any of them.
The only certification listed is the Denominacion de Origen Baena. Both lines are described as organic extra virgin, but no organic certifying body is named on the product pages we read.
This is worth stating without indignation. Publishing method is rare; publishing chemistry is rarer still; a producer who does the first and not the second is doing more than most of the category, not less. Their site does also make some general statements about antioxidants and health benefits, which we do not echo.
Three Honest Objections
"Free-run oil is just marketing for a low-yield gimmick." The method is real and mechanically distinct — gravity separation before pressing is not the same operation as pressing. Whether the resulting oil tastes better than a well-made modern extraction is a separate question, and one no producer can settle for you by describing their machinery.
"Without lab figures, how would I know it's good?" You wouldn't, from the numbers, because there aren't any. What you have instead is a DOP back-label, which certifies origin and requires a panel test, and a described process. That is a different kind of assurance, and a weaker one on freshness specifically, since a denomination certifies region rather than harvest date.
"An old stone mill can't be better than modern equipment." Often it isn't. Stone mills work slowly and expose paste to air for longer than a sealed modern line, which is a real oxidation risk. The counter-argument here is that the oil is drawn off without pressure and without added heat. Both points are true at once, and anyone telling you the traditional method is simply superior is skipping the trade-off.
Why Sidr & Stone
We write about producers like this because the comparison is genuinely instructive, not because we think it flatters us. Nunez de Prado has 250 years in one place and a method they describe in detail. Here is ours, stated the same way.
- Single-estate — one family-owned grove on the plains outside Marrakech, Morocco, with no blending across origins.
- Rain-fed — no irrigation; the trees take what the season gives them.
- Organically grown — no synthetic fertilisers, pesticides or herbicides. We are not certified organic and do not describe ourselves as such.
- Single harvest — one small pressing per season, picked only when the season says the fruit is ready, sometimes weeks after neighbouring farms.
- Cold-pressed within hours of harvest — flavour, aroma and polyphenols preserved.
- Unfiltered extra virgin — minimally processed, and it may show a little natural sediment.
- 100% natural — one ingredient, olive oil, nothing added.
- Dark glass with a gold label — packaging chosen to keep light off the oil.
- Halal certified, with 10% of profits going to charity.
- Fulfilment in the UK, EU, and US.
| Published detail | Nunez de Prado | Sidr & Stone |
|---|---|---|
| Extraction method described in detail | Yes — unusually fully | Yes — cold-pressed within hours of harvest |
| Yield per litre published | Yes — a little over eleven kilos of olives | Not published |
| Cultivars named | Yes — four | Single grove, single harvest |
| Polyphenol, acidity or peroxide figure | No | No — we do not publish one |
| Protected designation of origin | Yes — DOP Baena | No — no DOP exists for the region |
We will not tell you Sidr & Stone is the best olive oil — that would be exactly the claim this article is sceptical of. What we will say is that our oil is single-estate Moroccan, rain-fed, organically grown and cold-pressed within hours of harvest, and that where another producer publishes something we do not, you have just read it in a table.
Frequently Asked Questions
What is Nunez de Prado olive oil?
It is organic extra virgin olive oil from a family estate and mill in Baena, Cordoba, registered with the Denominacion de Origen Baena. The family has farmed there since 1795 and sells two lines: flor de aceite and a cold-pressed oil.
What does flor de aceite mean?
Literally "flower of the oil". It refers to free-run oil — the small amount that separates under gravity alone, drop by drop through a fine mesh, before the paste is pressed at all.
How many olives does a litre of flor de aceite take?
The producer states that a little more than eleven kilos of olives are needed for one litre by this method. That figure comes from their own product page and reflects how much oil is deliberately left in the paste.
Which olive varieties do they use?
Picuda, Picual, Hojiblanca and Arbequina, according to both product pages. Picuda, also called Picudo, is the variety most associated with the Baena region.
Is flor de aceite the same as first cold pressing?
No. Flor de aceite is taken before any pressing happens. The first cold pressing is a separate, later extraction from the same paste using a hydraulic press, and it is sold as a different product.
Does Nunez de Prado publish lab results?
Not that we could find. Their product pages carry certification, storage and tasting sections but no acidity, peroxide, polyphenol or K-coefficient figures. The only certification listed is DOP Baena.
What does the Baena DOP guarantee?
It guarantees that the oil comes from registered groves in the designated Cordoban municipalities and has passed the council's laboratory checks and tasting panel. It certifies origin and quality standards, not harvest freshness.
Is olive oil a medicine?
No. Olive oil is a food, not a medicine. It has a long traditional history — including being honoured in the Prophetic Sunnah — and a substantial body of modern research, particularly around polyphenols, cardiovascular health, and the Mediterranean diet pattern. It can be a worthwhile part of a healthy routine, but it does not cure diseases and is not a substitute for medical care. Be cautious of any olive oil marketed with specific disease-cure claims.
Final Thoughts
Most olive oil stories about tradition are unfalsifiable. You are shown a photograph of a stone wheel and invited to feel something. What makes Nunez de Prado worth writing about is that the story comes with a number attached, and the number is a cost rather than a benefit: eleven kilos of fruit for a litre, because the oil is taken without pressure and most of it is knowingly left behind.
The gap is chemistry. A producer this specific about mechanism publishes nothing about what the finished oil measures — no acidity, no peroxide value, no phenol count. That is normal in this category and it is still a gap, and it means the flor de aceite argument has to be taken on method and on the DOP panel rather than on figures.
We are in the same position, which is why the table above says "no" in our column too. What we can give you instead is the grove, the season and the method, without a single number we have not measured. Our cold-pressed organic Marrakech olive oil — single-estate, rain-fed and unfiltered — is available to pre-order. First harvest, estimated shipping from November 2026. Fulfilment in the UK, EU, and US. If you are still deciding what matters, start with our guide to choosing a quality olive oil.
Pre-Order Sidr & Stone Organic Marrakech Olive Oil — Limited First Harvest →
Disclaimer: This article describes Nunez de Prado's publicly published information as it appeared on the company's own website, and the Denominacion de Origen Baena's published specification as it appeared on the Consejo Regulador's website, at the time of writing; specifications and brand practices may change, and readers should check current sources. Comparisons are made in good faith and in fair terms. Olive oil is a food, not a medicine, and is not a substitute for medical treatment of any condition. For any health concern, consult a qualified medical professional.