La Ferté natural stone-ground chestnut flour: why it makes the difference

Not all chestnut flours are the same. What distinguishes a truly premium chestnut flour is not just the raw material, but how it is milled. At the La Fenice Farm, our flour is produced using a genuine La Ferté natural stone mill, one of the very few still in operation in Europe. In this guide, we explain what natural stone milling is and why it produces such high-quality flour.

What is natural stone milling

Stone milling is the oldest grinding method: two stone millstones rotate slowly, rubbing the seed until it is reduced to flour. It is a slow and delicate process, the polar opposite of modern high-speed industrial plants.

This slowness is the secret. A slow and "gentle" rotation prevents the flour from overheating, preserving its aromas, scents, and nutritional value. The result is a fine, refined chestnut flour with an intense aroma and a warm color.

The La Ferté stone: the finest in Europe

The millstones at La Fenice belong to the finest type of millstone known: the famous La Ferté stone, which comes from La Ferté-sous-Jouarre, a small area east of Paris. Its hardness is such that it has historically been the most sought-after millstone by millers throughout Europe.

Restoring an ancient genuine natural stone mill is a source of great pride for the company and a guarantee of quality: a heritage that tells a thousand-year-old story linked to the chestnut and its fruit.

Natural stone versus modern millstones

Modern "stone" millstones, which are very common today, are actually artificial agglomerates of emery, flint, and magnesite, often bonded with resins, additives, and dyes. They are designed to ensure high productivity and rotation speeds with minimal maintenance, albeit at the expense of quality.

Natural stone millstones, on the other hand, are carved directly from a real block of stone extracted from a quarry. Their maintenance—known as dressing—is constant: generations of stonemasons, armed with patience and a chipping hammer, trace the patterns on the millstone and sharpen its imperfections, shaping the stone for the best result. Each millstone is distinguished by its own hardness and porosity, making it ideal for a specific seed: wheat, spelt, semolina, corn, or, as in our case, chestnuts.

From the chestnut grove to flour: the controlled supply chain

Chestnut flour is one of the most prized products at La Fenice. It is made from Mugello PGI chestnuts harvested in the organic chestnut grove of Vicchio, then carefully dried and selected before milling.

The smaller chestnuts or those with slight defects, not suitable for the fresh market, are dried using traditional methods, "beaten" to separate the fruit from the husk, and finally stone-ground. It is a fully controlled supply chain, from the forest to packaging, which you can learn more about on our page dedicated to tradition and stone milling.

Properties of chestnut flour

• Gluten-free: ideal for celiacs and those with intolerances.
• Energizing and satiating: complex carbohydrates and fiber provide slow-release energy.
• Naturally sweet: allows for the reduction of added sugars.
• Rich in minerals: potassium, magnesium, and B vitamins.

Chestnut flour or "marroni" flour: what's the difference

The two terms are often used as synonyms, but there is a difference in quality. The "marrone" is a selected cultivar of chestnut: it is a larger, sweeter fruit, with only one nut per burr. Its flour is finer, more aromatic, and less bitter. In short: all flour from "marroni" is chestnut flour, but not vice versa. Ours uses only Mugello PGI Marroni.

How to use chestnut flour in the kitchen

Chestnut flour is naturally gluten-free, making it ideal for those who are celiac or follow a gluten-free diet. It is the fundamental ingredient of castagnaccio, but it also lends itself to many other preparations: fresh pasta like tagliatelle, pancakes, muffins, cookies, crepes, bread, and even traditional peasant soups and gnocchi.

Available in 500g and 1kg sizes and certified organic, our Mugello PGI chestnut flour brings all the authentic scent of the Tuscan forest to your table. For ideas and measurements, take a look at our guide to gluten-free products made from chestnuts.

Frequently asked questions

Why is stone-ground flour better?

The slow rotation of the natural stone prevents overheating and preserves the aromas, scents, and nutrients of the chestnut, resulting in a finer and more flavorful flour compared to high-speed industrial milling.

What is the La Ferté stone?

It is a natural millstone from La Ferté-sous-Jouarre, France, historically considered the finest and most sought-after in Europe for its hardness.

Does chestnut flour contain gluten?

No, pure chestnut flour is naturally gluten-free and is suitable for celiacs, provided it does not undergo cross-contamination during processing.

Discover the stone-ground Mugello PGI chestnut flour from the La Fenice Farm: visit the shop.

Want to learn more about nutritional values and benefits? Read our article on the nutritional properties of chestnut flour.