What Is Ash Content in Flour and Why It Matters for Bread Quality
If you've ever seen European flour labeled with numbers like T65 or T110, you've encountered the ash content system. Understanding ash content reveals a lot about flour quality and why fresh-milled flour produces fundamentally better bread.
What Is Ash Content?
Ash content is the mineral content of flour, measured by incinerating a sample at high temperature. What remains — the "ash" — consists of minerals like calcium, iron, magnesium, and phosphorus that were present in the grain. Higher ash content means more of the whole grain (bran and germ) is present in the flour.
In the French flour classification system, the number directly corresponds to ash content: T45 (pastry flour, ~0.45% ash) up to T150 (whole wheat, ~1.50% ash). American flour labeling doesn't use this system, which makes it harder for consumers to understand what they're actually buying.
Why Ash Content Matters for Nutrition
Higher ash content directly correlates with higher mineral content. White flour (low ash) has been stripped of the bran and germ where most minerals reside. Whole grain flour (high ash) retains these nutrient-dense components. When we fresh-mill our grain at Silo & Stone Co, we preserve the complete mineral profile of the whole kernel.
Ash Content and Flavor
Minerals don't just contribute to nutrition — they influence flavor. Higher-ash flours produce bread with more complex, earthy, nutty flavors. This is why artisan bakers in France prize higher-extraction flours: they create bread with character and depth that refined white flour simply cannot achieve.
The Fresh-Milled Difference
Commercial whole wheat flour, even when labeled "whole grain," has often been reconstituted — white flour with bran added back in. Fresh-milled flour from Silo & Stone Co retains the natural ratio of endosperm, bran, and germ as nature intended, with nothing removed and nothing artificially added back.
Experience the depth of flavor that comes from properly milled grain. Order our fresh-milled sourdough bread for delivery across Dallas-Fort Worth.