The world’s most expensive edible oil
For centuries a mainstay in the Berber diet, the Moroccan culinary ‘gold that grows on trees‘ is a distinctive contribution to world cuisine. Its antioxidant properties are much prized by Berbers, and its rich flavor by leading chefs around the world.
Added to milder oils, it enriches salad dressings, and in the classic amlou spread or as a finishing oil, the oil wears an antioxidant halo. From a flavor standpoint, argan oil works especially well in combination with seafood and citrus fruit. The healthful properties of the oil are lost when heated, so it is not for cooking.
In the early 16th century, the Arab explorer and chronicler Hasan al-Wazan, called Leo Africanus in the West, reported tasting argan oil mixed into barley porridge, a traditional mark of hospitality that continues to the present day. Five hundred years after Africanus, Tom and I were welcomed into a rural Moroccan home with a platter of creamy rice, drizzled with argan oil glistening in amber swirls. Served at room temperature, this was Berber rice pudding, slightly sweet, the nutty oil deeply flavored.
Not long after I first tasted amlou, I learned something of the hard-scrabble backstory behind argan oil on that visit to a remote farm in the Atlas Mountains. My host had adjusted her headscarf and settled onto the stone floor in her living room, a gunnysack of fire-roasted argan nuts at her side and a large stone between her feet. She showed me how to husk the nuts, bashing each one with a smaller stone, sending shells flying. Then, smiling shyly, she motioned for me to take my place on the floor beside her and handed me the small stone. It was hard going, and I clubbed my thumb and forefinger with every stroke. I got the picture: this oil is cussedly difficult to produce.
A forest no longer
The argan forest has long been a primary source of forage, oil, timber, and fuel for Berber settlements. By the 1980s, though, charcoal-making and overgrazing by goats and camels, coupled with years of drought in the Souss river valley, had led to the destruction of much of the ancient forest cover.
Today, argan trees are found naturally only in an area bounded north-south by Essaouira and Tiznit, and west-east by Agadir and the Anti-Atlas valleys south of Marrakesh.
The argan nut’s exterior is green and fleshy, similar to an olive, but larger and rounder (it is actually a drupe, like an apricot or peach). The thick, bitter peel surrounds a sweet-smelling, unpleasantly flavored layer of pulp. This conceals an extremely hard nut, which in turn contains one to three oil-rich kernels.
A Berber culinary tradition
The most labor-intensive task in producing argan oil is, as I found out, cracking the hard nut manually between two stones. The kernels are air-dried, and those destined for culinary use are roasted over mild heat, which enhances the oil’s peppery flavor. Traditionally, the roasted kernels are then ground to a paste in a hefty stone quern, blended with warm water, then manually kneaded and filtered. This extraction method is still followed to produce oil for home use.
A cash crop with staying power
Oil produced in the traditional way keeps up to six months and unopened argan nuts can be stored for as long as 20 years. Rural families sell nuts from their silo ‘bank accounts’ when they need cash.
Nowadays, mechanical grinding has mostly replaced the quern in commercial production. It shortens production time, does away with the need for filtering with water, and lengthens the shelf life of the bottled oil, to 18 months or more. The flavor of the end product is also milder than oil produced by traditional methods.
Do try this at home!
Argan oil is readily available in Europe and North America, and can be ordered online—a seismic shift for an ingredient that until not so long ago was a secret of the Berber kitchen. No nut-bashing required!
Four ways to put argan oil to work for your table:
- As a finishing oil to drizzle on fish, vegetables, soups and pasta
- Mixed with lighter oils in salad dressings
- With this griddle bread from Paula Wolfert, or for the holiday season, this fig jam, both from Epicurious
- Make your own amlou!
Have you tried Morocco’s Liquid Gold?