Product knowledge
What Does Grind Size Mean for Ground Spices?
Grind size is simply how finely a spice has been milled, running from cracked or coarse ground through to a fine, almost powdery texture, and it changes how a spice behaves in a dish more than most cooks expect. A coarse grind has less surface area exposed to air and heat, so it releases its aroma and flavour more slowly and holds its texture in a finished dish; a fine grind has far more surface area, so it releases flavour fast, dissolves into a sauce or rub evenly, but also loses its own aroma to oxidation faster once it's opened.
Mesh numbers, in plain terms
Mills describe grind size using mesh numbers — a count of how many openings per inch a sieve has that the ground spice passes through. A low mesh number, like 20, lets through larger, coarser particles; a high mesh number, like 60 or higher, only lets through very fine, powder-like particles. In practice, most buyers never need to think in mesh counts directly — a supplier's product description usually just says "coarse ground," "fine ground" or similar — but knowing that the terms map to a real, measurable particle size (rather than being a loose marketing word) helps when comparing what two different suppliers mean by "ground."
Grind size and aroma release aren't the same thing
A finer grind releases aroma and flavour faster once it hits a warm pan or a liquid, because more of the spice's surface is exposed at once — useful when a dish needs a spice's flavour to bloom quickly and distribute evenly, as with a fine-ground ground cumin stirred into a spice paste. That same larger surface area is also why fine-ground spice loses its own potency in storage faster than a coarse grind or a whole spice — the same exposure that speeds flavour release in cooking speeds oxidation on the shelf. A kitchen buying in volume gets more consistent flavour over the life of a case by choosing the coarsest grind that still suits the dish.
When coarse beats fine
Coarse-ground black pepper holds its bite and visible texture on a crust or a finishing sprinkle in a way fine-ground pepper can't — the point of a coarse grind on a steak or a salad is exactly that it stays a distinct, crunchy element rather than dissolving in. Coarse grinds also resist scorching better under high, direct heat, like a grill or a hot pan, since a fine powder's greater surface area burns and turns bitter faster at the same temperature. Fine grinds earn their place in sauces, marinades, baked goods and anywhere a spice needs to disappear evenly into the mixture rather than stay visible.
Related questions
Does a finer grind mean a stronger flavour?
It means faster-releasing flavour, not necessarily stronger overall — a coarse grind delivers the same total flavour more slowly, and can taste more intense in bursts where a fine grind delivers a more even background note.
Should a kitchen buy pre-ground spice or grind whole spice as needed?
Whole spice, ground as needed, holds potency longest, which suits low-volume or infrequent use. High-volume kitchens using the same spice daily generally get more consistent, faster results from a pre-ground format sized to how much they actually use before a case turns over.
Does grind size affect how a spice should be stored?
Yes — the finer the grind, the more it benefits from an airtight container away from heat and light, since the larger exposed surface area makes fine-ground spice more vulnerable to flavour loss than a coarse grind or a whole spice.