Blood Orange Olive Oil: The Calendar and the Colour
Blood orange olive oil is one of the few flavoured oils that genuinely earns its place, and one of the hardest to buy well. The bottles look alike and the front labels say much the same thing, but the products inside them are not the same. The useful news is that you do not need the producer's cooperation to work out roughly what you are holding. Two things give it away: the calendar, and the colour. Both are checkable from the bottle and neither depends on trusting the marketing.
For our own oil, see our cold-pressed organic Marrakech olive oil.
The Short Answer
- Blood orange olive oil is made in one of three ways: whole oranges milled together with the olives, oranges or zest steeped in finished oil, or a flavouring added after pressing. The front label rarely tells you which.
- The calendar is the tightest constraint. Under the production specification for Olio EVO IGP "Sicilia", the olive harvest runs 1 September to 30 January; the Arancia Rossa di Sicilia consortium gives its blood orange season as mid-December to mid-June. The two overlap for roughly six weeks.
- That means genuinely co-milled Sicilian blood orange oil can only be made late in the olive harvest, from a small window — which is why so much of what is sold is infused or flavoured instead.
- The colour is the second tell, and it is the more useful one. The red pigments in a blood orange are anthocyanins, which are water-soluble. Olive oil is a fat. A genuine blood orange olive oil is green-gold, not red or pink.
- The protected Arancia Rossa di Sicilia IGP covers three cultivars — Tarocco, Moro and Sanguinello — and has been registered since June 1996.
- Whether a co-milled citrus oil may legally be called "extra virgin olive oil" in the EU is genuinely unsettled; the current instrument addresses foodstuffs added to oil, not fruit milled with olives.
- Sidr & Stone does not make a flavoured oil. Ours is single-estate Moroccan extra virgin, cold-pressed within hours of harvest, one ingredient and nothing else.
Three Different Products, One Shelf Label
Before the useful part, the taxonomy, briefly — because we have covered it properly elsewhere and there is no sense in restating it here. Whole citrus milled alongside the olives, citrus steeped in finished oil, and flavouring added after pressing are three distinct products that arrive under near-identical front labels. Our guide to lemon olive oil takes that distinction apart in full, including what the word agrumato does and does not mean and why the trademark confuses things; our infused olive oil guide covers the category as a whole.
What nobody covers is why blood orange is a harder case than lemon. That is what the rest of this article is about, and it comes down to two things a lemon does not have to worry about: a short season, and a pigment that will not come with it.
The Calendar: A Six-Week Window
Milling fruit with olives requires both to be ripe at the same time, in the same place, on the same day. For lemons that is easy — Sicilian lemons crop across much of the year, including a winter harvest that sits comfortably inside the olive season. For blood oranges it is genuinely tight.
| What | Window | Source |
|---|---|---|
| Sicilian olive harvest | 1 September – 30 January | Production specification for Olio Extra Vergine di Oliva IGP "Sicilia", Article 5 |
| Sicilian blood orange season | Mid-December – mid-June | Consorzio di Tutela Arancia Rossa di Sicilia IGP |
| Overlap available for co-milling | Roughly mid-December – 30 January | The intersection of the two above |
About six weeks, at the tail end of the olive harvest. That single fact explains a great deal about the category.
It explains why genuine co-milled blood orange oil is made in small quantities and sold out of season. It explains why it tends to come from producers who grow both crops, or mill for a neighbour who does — the logistics do not survive a long journey between orchard and mill. And it explains why the majority of blood orange olive oil on general sale is infused or flavoured: those methods can be done in July from stored oil, and co-milling cannot.
It also carries a quality implication that cuts both ways, and it is worth being honest about. Olives milled in mid-January are late-harvest olives. Late picking gives a riper fruit, a higher oil yield, a softer and sweeter oil, and — generally — a lower polyphenol content than the same grove would give in October. So a co-milled blood orange oil is not simply a fine early-harvest oil with citrus added. It is, by the constraint of the calendar, made from the later end of the season. That is not a defect. It is just not the thing the romance implies.
The Sicilian IGP specification also requires milling within 48 hours of harvest, which is the same logic that governs any serious oil: the clock starts when the fruit leaves the tree. Our guide to Sicilian olive oil goes into the region's cultivars and harvest practice in more depth.
The Colour Tell: Why a Real One Is Not Red
This is the single most useful thing in this article, and it takes one sentence to apply in a shop.
The deep red of a blood orange comes from anthocyanins — the same family of pigments that colours blackcurrants and red cabbage. The production specification for the Arancia Rossa di Sicilia IGP describes the juice's blood-red colour as owing to the presence of water-soluble pigments, naming anthocyanins explicitly. Water-soluble is the operative word. Olive oil is a lipid; anthocyanins are at home in water and not in fat, so they do not follow the citrus oil into the olive oil during milling.
What that means in practice: a blood orange olive oil made by milling whole blood oranges with olives comes out green-gold, exactly like the olive oil it mostly is. It does not come out red, pink, or orange-tinted. The colour of the fruit does not transfer, because the part of the fruit that carries the colour is not the part that dissolves in oil.
So if you are looking at a bottle of blood orange olive oil that is visibly reddish or orange, the colour has come from somewhere other than co-milled blood oranges. That might be an added colouring, or a paprika or annatto extract riding along with a flavouring, or simply coloured glass and a red label doing the work in your head. None of those is illegal and none is necessarily bad — but none of them is what the word "blood" on the label is inviting you to picture, either.
It is a genuinely rare thing in this category: a test you can run through the glass, before you buy, without asking anyone anything.
Which Blood Orange? Moro, Tarocco and Sanguinello
"Blood orange" is not one fruit. The Arancia Rossa di Sicilia IGP — a Protected Geographical Indication registered with the EU on 21 June 1996 — reserves the name to three cultivars, and they are not interchangeable.
| Cultivar | Character | Covered by the Arancia Rossa di Sicilia IGP |
|---|---|---|
| Moro | The most intensely coloured of the three and the most assertive in flavour, with a pronounced berry note over the citrus | Yes |
| Tarocco | The best known and generally the sweetest, with lower acidity and a lighter, more variable blush | Yes |
| Sanguinello | The latest of the three, firm-fleshed, keeping its colour well into spring | Yes |
A producer naming the cultivar is telling you something real, and it is the mark of somebody who milled the fruit themselves rather than bought a flavouring. A producer saying only "blood orange" may be doing either. If the label names Moro or Tarocco alongside the olive variety, that is a good sign — two named cultivars is the sort of specificity that is awkward to fake.
One caution about the IGP itself: it protects the oranges, not any oil made with them. A bottle of oil cannot be Arancia Rossa di Sicilia IGP. It can be made using fruit that is, which is a different and weaker statement — a useful one, but not a designation the oil holds.
What the Label Is and Isn't Obliged to Say
The regulatory position here is less tidy than buyers assume, and we would rather show you the edge of what is established than paper over it.
The instrument governing olive oil marketing standards in the EU is Commission Delegated Regulation (EU) 2022/2104, which repealed the long-cited Regulation (EEC) No 2568/91 — so any article still citing 2568/91 as current law is out of date. Article 12(6) of 2022/2104 provides that when other foodstuffs are added to olive oil, the resulting foodstuff shall not bear any of the legal names reserved to the olive oil grades. That is clear enough for a steeped or flavoured oil.
What it does not expressly address is co-milling, where the citrus goes into the mill with the olives and there is no finished oil for anything to be added to. We looked for a Commission guidance note, a ruling or a member-state determination settling that point and did not find one. So the honest position is that it is unsettled, and serious producers land on both sides of it in good faith. Our guide to smoked olive oil works through the flavoured-oil labelling rules in detail, including the ingredients-panel requirements that do apply.
| What you see on the bottle | What it usually indicates | What to check next |
|---|---|---|
| "Natural flavouring" or "aroma" in the ingredients | Flavour added after pressing; no fruit was milled | Nothing further — this settles it |
| Ingredients read "extra virgin olive oil, blood oranges" | Real fruit was involved, by milling or steeping | Whether the producer says crushed together or infused |
| A named cultivar (Moro, Tarocco, Sanguinello) | Someone handled actual fruit | Whether an olive variety is named too |
| Visibly red or orange oil | Colour from something other than co-milled fruit | The full ingredients list |
| A harvest or milling date in December or January | Consistent with genuine co-milling | Nothing — this is the strongest single signal |
The Objections Worth Taking Seriously
"Does any of this actually change how it tastes?" Yes, and more than with most flavoured oils. Co-milling captures the oils in the peel as the fruit is crushed, which gives a rounded, slightly bitter citrus that sits inside the oil. A post-press flavouring tends to sit on top of it — brighter on first contact, thinner behind. Whether that is worth the difference is a matter of taste, but the difference is real and most people can pick it in a side-by-side.
"Isn't a flavoured oil a bit of a waste of good olive oil?" A fair objection. Producers making a co-milled oil are giving up yield and using late-harvest fruit; the result is a condiment rather than an everyday oil. Treated as a finishing oil — over fennel, over ricotta, over a chocolate or almond cake, over roasted beetroot — it earns its place. Used as a general cooking oil it does not, and the citrus notes are the first thing heat destroys.
"If the colour doesn't transfer, is 'blood orange' even meaningful?" It is, but as a flavour statement rather than a visual one. The three cultivars taste materially different from a common orange — Moro in particular carries a berry character that a Valencia does not — and that character does carry into the oil even when the pigment does not. The name is honest; it is the picture in the buyer's head that needs correcting.
Why Sidr & Stone
We do not make a flavoured oil, and this article is not a soft pitch for one. What a piece like this is really about is the same question every olive oil article comes back to: how much does the producer tell you, and how much are you being asked to assume?
- Single-estate — one family-owned grove on the plains outside Marrakech, Morocco; no blending across origins
- Rain-fed — no irrigation; the trees take what the season gives
- Organically grown — no synthetic fertilisers, pesticides or herbicides
- Single harvest — a small, limited batch; once the season's pressing is gone, it is gone until next year
- Cold-pressed within hours of harvest — flavour, aroma and polyphenols preserved
- Unfiltered extra virgin — minimally processed, and it may show natural sediment
- 100% natural — one ingredient, olive oil, no additives and nothing else
- Dark glass with a gold label — protective packaging against light
- Halal certified
- 10% of profits to charity, across every Sidr & Stone product
- Fulfilment in the UK, EU, and US
The one-ingredient point is the relevant one here. A flavoured oil has an ingredients list you need to read; ours has one line. That is not a criticism of anyone making a good co-milled oil — it is simply a different product with a different job.
We will not tell you Sidr & Stone is the best olive oil — that would be the very claim this article warns against. 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 the evidence of that care is in the taste, the colour, and the season's small limited batch.
Frequently Asked Questions
What is blood orange olive oil?
Olive oil carrying blood orange flavour, made either by milling whole blood oranges together with the olives, by steeping fruit or zest in finished oil, or by adding a flavouring after pressing. The three are different products and the front label rarely distinguishes them.
Should blood orange olive oil be red?
No. The red pigments in a blood orange are anthocyanins, which are water-soluble and do not dissolve into a fat. A genuine blood orange olive oil is green-gold. Visible red or orange colour has come from something other than co-milled fruit.
When is blood orange olive oil actually made?
Co-milled versions can only be made where the two seasons overlap. The Sicilian IGP olive harvest window runs 1 September to 30 January, and the blood orange consortium gives its season as mid-December to mid-June — an overlap of about six weeks in mid-winter.
Which blood oranges are used?
Tarocco, Moro and Sanguinello are the three cultivars covered by the Arancia Rossa di Sicilia IGP. Moro is the most intensely coloured and assertive, Tarocco the sweetest, Sanguinello the latest in the season.
Can blood orange olive oil be labelled extra virgin?
For oils where flavouring is added after pressing, Commission Delegated Regulation (EU) 2022/2104 provides that the resulting foodstuff shall not bear the reserved legal names. For co-milled oils the position is genuinely unsettled, and reputable producers take different views in good faith.
How can I tell what I am buying?
Read the ingredients rather than the front label. "Natural flavouring" settles it. Real fruit listed as an ingredient, a named orange cultivar, a green-gold colour and a December or January date together make a strong case for co-milling.
What should I use it for?
Finishing rather than cooking. It suits fennel, ricotta, roasted beetroot, bitter leaves and almond or chocolate cakes. Heat drives off the citrus aromatics first, so add it at the end.
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 advice about flavoured olive oil ends in a counsel of despair — read the ingredients, trust the producer, hope for the best. Blood orange is the unusual case where the product's own physics hand you two independent checks that the marketing cannot override. The seasons only overlap for about six weeks, so a co-milled oil is a mid-winter product or it is not co-milled. And the pigment that gives the fruit its name is water-soluble, so a real one is green-gold and a red one is telling you something.
Neither test is perfect and neither replaces a properly labelled bottle from a producer who says what they did. But between them they will sort most of a shelf, and they cost nothing to apply. If you want the fuller treatment of how the flavoured-oil category works overall, our chilli olive oil guide covers the hot- and cold-infusion methods that the citrus oils share.
If what you actually want is the plain thing underneath all of it, our cold-pressed organic Marrakech olive oil — single-estate, rain-fed, organically grown and cold-pressed within hours of harvest — is available to pre-order. First harvest, estimated shipping from November 2026. Fulfilment in the UK, EU, and US.
Pre-Order Sidr & Stone Organic Marrakech Olive Oil — Limited First Harvest →
Disclaimer: This article explains how blood orange olive oil is produced and labelled, based on production specifications and regulations current at the time of writing; specifications and rules may change, and readers should check current sources. Where the regulatory position is unsettled we have said so rather than resolved it. 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.