What Is Truffle Good For?
August 20, 2018
In 2014, the world’s largest white truffle, weighing 4.16 pounds (1.89) kilos was auctioned at an astounding price of $61,250.1 To say that was a lot of money for a fungus is surely an understatement, but considering that truffles are a savory culinary treasure that cannot be cultivated or bought just anywhere can certainly make up for its extravagant price.
So what exactly are truffles and why are they so revered in the culinary world?
What Is a Truffle?
Truffles (Tuber) are an edible type of fungus that grows underground (subterranean). They usually thrive 2.5 to 10 centimeters below the soil, and mainly live off the roots of certain tree varieties, like oak and hazelnut.2 Attaching to a host allows them to receive sugars that they need to grow, and in turn, they provide the tree with phosphorus.3 Once the tree and the fungal filaments have reached maturity, (typically about five years), the edible “fruiting body” is produced and then harvested.4
Although truffles are often classified as a type of mushroom, they do not have the same appearance that most mushrooms have. They’re usually round and firm, with a texture similar to a potato. Their skin is tough and scaly, which is understandable considering the conditions they grow in.5
There are two primary types of truffle, both from Europe (particularly in Italy and France), that are highly prized today:6
- Black truffle (tuber melonosporum) is a cold-weathered fungus that’s usually found thriving under oak trees from September to December. It originally hails from the Perigord region in southwest France. Black truffle can sell for over $400 a pound.
- White truffle (tuber magnatum) is originally grown in the Piedmont region in northern Italy, particularly in the countryside around Alba. These truffles grow on the roots of oak, poplar, beech and hazel trees, usually in the winter and autumn months. Piedmont’s white truffles are said to be more aromatic, and cost much more than other varieties – as much as $2,200 per pound.
Truffles are not harvested the same way that mushrooms are. Instead, specially trained dogs or pigs are used to sniff and dig out these fungi. Recently, however, truffle farmers prefer using dogs, as hogs tend to eat the hard-to-find and expensive delicacy.7
But what exactly do truffles taste like? There are several ways to describe the flavor and odor of this food, but probably the best description would be earthy or woody. Truffle actually contains three types of umami substances, and adding just a thin slice of it can add a rich flavor to foods.
Black truffle tastes earthy and has a pungent odor, while white truffle’s flavor hints of shallots and garlic, and has a musky aroma.8 The white truffle is said to be superior in taste compared to the black truffle, which is why it’s more expensive.
Recently, truffles have been the subject of controversy, mainly because of the spread of Chinese truffles. In China, truffles have been mainly used as feed for pigs, until one businessman decided to sell these to the French. Known as tuber indicum, these “fake truffles,” although significantly cheaper in price, lack the taste and smell of true truffles. This is because the Chinese do not use dogs or pigs to track and sniff out the truffles when they have ripened – instead, they rake at the ground and harvest the fungi once they see them, even if the fungi have not yet reached their peak ripeness.9 Many French truffle growers have declared war against these cheap products, which they say unscrupulous chefs are using to dupe customers.10
How to Use This Delicate Ingredient
Remember to treat truffles just like most produce: the fresher they are, the better they taste. Truffle’s aroma and flavors can diminish by half within four to five days after harvesting, so if you manage to get your hands on one, use it immediately.13 Here’s a recipe you can try:14
✓ 700g peeled Ruby Lou potatoes
✓ 1 small pastured egg
✓ Small pinch of Himalayan salt
✓ 140g coconut flour
✓ 40g black winter truffle – ½ grated, ½ sliced
✓ 1 Tbsp. coconut oil
✓ ½ onion, finely chopped
✓ ½ white grape juice
✓ 1 cup of homemade chicken stock
✓ 1 large garlic clove, finely chopped
✓ 1 cup thickened cream
✓ 100g baby spinach
- Boil potatoes till cooked but still firm. Drain and put through potato ricer. Add egg, salt and flour and knead until combined, on a well-floured bench.
- Divide dough into balls, rolling each ball into sausages, and cut into bite-sized pieces. Roll each piece over the back of a fork, leaving a slight indentation.
- Cook gnocchi in batches in a pot of boiling salter water until they float to the surface of the pot.
- Prepare sauce. Fry onion in coconut oil until lightly brown then lightly toast the garlic. Add grape juice and reduce by half, then blend until smooth. Add the stock and cream and reduce till the sauce coats the back of a spoon.
- Add gnocchi and the grated black truffle, then add the spinach until wilted. Serve with sliced black truffle. Add salt and pepper to taste.
This recipe makes 2 servings.
(Adapted from The Truffle and Wine Co.)
Due to their high price, some people may opt out of using fresh truffle and settle for truffle oil instead, which they drizzle to dishes, add to sauces or use as a seasoning. But beware: most truffle oils today are fake.
So what is the truffle oil you see on grocery shelves made of? It’s actually a chemical concoction that has not been infused with or made with any real truffle.15 Commercially sold truffle oils are made from a base oil, such as olive oil or other vegetable oils, blended with artificial chemicals like 2,4-dithiapentane, which replicate the natural gases that real truffles produce.16
So while they do, admittedly, emit the same aroma and flavor of these fungi, you’re actually not getting the real deal.
How to Grow Truffles: It’s Not as Easy as It Seems
Many people are not aware where truffles grow, but most probably believe that these are wild-growing fungi that can only be acquired from forests. Here’s a fact: most truffles today are actually cultivated. However, truffle growing is an intricate and lengthy process.
Once you’ve planted a host tree and impregnated it with the fungi, it may take between four to seven years before the first truffle appears.17 The weather also plays a significant role in truffle production, as these fungi need four well-defined seasons to thrive. They grow best in a temperate climate that does not have any extreme temperature variations.
Snow is ideal, since it insulates the ground and keeps truffles warm, but once the temperature goes down around 20 degrees Fahrenheit and below for more than a few days, the truffles may become damaged. It might also be difficult to harvest winter truffles if the ground is frozen.18
If your budget permits it, it’s good to indulge in truffles every once in a while, especially if you consider that they may offer significant nutrients that are good for your health.19
|Calories from Fat|
|Total Fat||16 g|
|Saturated Fat||10 g|
|Total Carbohydrates||21 g|
|Dietary Fiber||1 g|
|Vitamin A 5%||Vitamin C||8%|
*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
However, make sure that you’re getting real truffles – not truffle oil and most definitely not fake Chinese truffle. The price may be a bit steep, but the flavor genuine truffles bring is surely unforgettable.
- 1 Business Insider, Dec. 8, 2014
- 2 Just Fun Facts, Interesting facts about truffles
- 3 The Telegraph, Oct 8, 2008
- 4 Oak Valley Truffles, About Truffles
- 5 See ref 4
- 6 Love to Know, What is a truffle?
- 7 The Huffington Post, Mar 24, 2012
- 8 Reference, What is the difference between black and white truffle oil?
- 9 CBS News 60 Minutes, June 4, 2012
- 10 The Telegraph, March 4, 2014
- 11 Gourmet Food Store, Cooking With Truffles
- 12 See ref 11
- 13 See ref 7
- 14 The Truffle and Wine Co, Potato Gnocchi with Truffle
- 15 What's Cooking America, White Truffle Oil vs Black Truffle Oil
- 16 See ref 8
- 17 Mirror, January 11, 2016
- 18 Grit, May/June 2014
- 19 MyFitnessPal, Calories in Tartufo Nero Estivo (Summer Black Truffle)