Nuts

Shell

The acorn shell is the hard woody pericarp that locks the kernel away from insects and weather until cracked. It is not food. Foragers and mills crack, winnow, and discard it before any leaching or milling of the meat. Shell hardness varies by oak species and season; thick shells protect storage life but slow home processing. Fragments left in meal are a dental hazard, so aspiration and hand-picking matter as much as flavour work later. Clean empty shells can go to compost or biomass; they are not a smoking wood or edible crisp. Sound closed shells keep kernels safer in dry bins than open, warm shelled stock. Reject lots with exit holes, powdery frass, or mould seeping at the cap scar—the shell already failed. Never treat shell colour or shine as a flavour guarantee; only the meat after processing tells quality.