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Olive oil guide · Fábrica Douro

The olive oil guide.

Grades, green or ripe olives, varieties and how to store. What we explain at our mill tastings, in a five-minute read.

Grade

Extra virgin and virgin

These are oils made from olives alone, by mechanical processes. What sets them apart is acidity and the official tasting.

The extra virgin has free acidity up to 0.8% and no defects on tasting: it is the highest grade. The virgin may go up to 2% and allows small defects.

You cannot taste acidity. It is measured in the lab, and at our mill it is checked by titration in every batch.

Below these two there are other grades also sold as olive oil, but they are no longer pure olive juice.

0 % 0,8 % 2 %
Extra virgin · up to 0.8%
Virgin · up to 2%
Extra virgin at Fábrica Douro

Quinta das Fiandeiras, Ouro da Fábrica Clássico, AV, Organic, Bag in Box, Tin and 5-litre demijohn.

Virgin at Fábrica Douro

5-litre jerrycan, for every day.

From the bottle to the pomace

The five grades, from highest to lowest. Reading the label tells you which step you are on.

1

Extra virgin olive oil

At Fábrica Douro
Acidity up to 0.8%
Tasting No defects on tasting, with fruitiness. Olives and mechanical processes only.
To The table, raw and cooked
2

Virgin olive oil

At Fábrica Douro
Acidity up to 2%
Tasting Small defects allowed on tasting. Also olives and mechanical processes only.
To Everyday cooking
3

Lampante olive oil

Acidity above 2%
Tasting Marked defects or high acidity. It cannot be sold for consumption.
To Goes on to be refined
4

Olive oil

Acidity up to 1%
Tasting A blend of refined olive oil and virgin olive oil. The label must say so.
To Cooking
5

Olive pomace oil

Acidity up to 1%
Tasting Extracted with solvents from the pomace left over at the mill, then refined.
To Frying and industry

Green or ripe?

Olives turn from green to black over the harvest. The earlier they are picked, the more intense and longer-lasting the oil. The later, the milder it is and the more oil they give.

Drag through the harvest Green fruitiness
Late October November December Early January
Bitterness and pepperiness
Antioxidants (polyphenols)
Shelf life
Oil per kilo of olives
Organic

From organic groves

Certified organic production, with no synthetic fertilisers or pesticides. Ours comes from the Douro and Torto valleys.

Ouro da Fábrica Organic
Cold extraction

Below 27 °C

The olive paste is malaxed slowly, without heating, to keep the aromas and phenolic compounds.

How the mill works
How to store

Away from light, heat and air

Dark bottle, tin or Bag in Box, tightly closed and away from the stove. That is how the oil rests in our vats.

How to use

Raw, or for cooking

Intensely fruity oils shine raw: bread, salads, boiled vegetables. Milder ones also suit everyday cooking.

Recipes from the mill

Each olive gives its own oil

The varieties we work with and what each brings to the blend. A good blended oil combines them for balance.

Galega

The most planted in Portugal

A sweet, delicate oil with ripe fruitiness and notes of almond and apple. Low in bitterness and pepperiness: it softens the blend and pleases first-time tasters.

Fruitiness
Bitter
Peppery
Found in In the mill's blends

Cobrançosa

The most planted in Trás-os-Montes

Balanced: medium green fruitiness, bitterness and pepperiness present without dominating, notes of apple and olive leaf. Good yield and keeps well.

Fruitiness
Bitter
Peppery
Found in Quinta das Fiandeiras · Clássico · Organic

Verdeal

From Trás-os-Montes

Intense green fruitiness, marked bitterness and pepperiness, herbaceous notes. Rich in antioxidants and very stable: it gives the Quinta's oil its intensity.

Fruitiness
Bitter
Peppery
Found in Quinta das Fiandeiras

Madural

Ripens early

A sweet, mild oil with ripe fruitiness reminiscent of nuts and ripe apple. Low in bitterness, it rounds off the blends.

Fruitiness
Bitter
Peppery
Found in Clássico · Organic

Cordovil

From Trás-os-Montes

Intense fruitiness, with notes of tomato and grass. Medium to high bitterness and pepperiness, it gives structure and colour to the blend.

Fruitiness
Bitter
Peppery
Found in Clássico · Organic

Find yours

Tap an oil and see what you will find when tasting.

Bottle of Quinta das Fiandeiras Premium

Quinta das Fiandeiras Premium

500 ml · Cobrançosa and Verdeal

From olive trees over 300 years old, on the slopes of Quinta das Fiandeiras. Careful selection and hand-picked harvest.

On the palate
Intense fruitiness
Ripe fruitiness
Freshly cut grass
Tomato leaf
Olive leaf
Green apple
Nuts
Bitter
Peppery
Mild aroma

The best way to understand is to taste.

On the mill tour we taste two oils side by side, with local bread.