Almond Kernels

Shelling cracks the shell and separates it from the kernel, and the operation is judged on how much of the kernel survives intact. Chipping, scratching, and breakage all downgrade the product, so the shelling line is engineered as a compromise between cracking hard enough to open the shell and gently enough to leave the seed whole. Kernels come off the line with their brown skin on; blanching removes it with hot water for uses where a white kernel is wanted.

Variety type

Kernels are grouped by shape and appearance into commercial types, because processors need consistent behaviour rather than a botanical name.

Count size

Kernel size expressed as the number of kernels per unit weight — a smaller count means larger kernels.

Blanching

Removal of the brown skin with hot water, used where a white kernel is required for appearance or further processing.

Kernel grades combine variety type, count size, and the incidence of defects — chips and scratches, doubles, splits, shrivelled and gummy kernels, insect damage, and foreign material. Whole, unblemished kernels of a uniform size carry the premium, and the further a lot falls from that, the more likely it is to be routed into a processed form where appearance stops mattering.

That routing is the industry's pressure valve. Kernels are sold whole, but also sliced, slivered, diced, blanched, roasted, and ground into flour, butter, and paste — and a broken kernel that would fail a whole-kernel grade is entirely acceptable input for any of those. Almond-based drinks take kernels in bulk without regard to appearance. This is why an almond sheller has far more room to place off-grade product than a fresh-fruit packer does.

A properly dried kernel does not spoil microbially — it goes rancid. Oxidation of the kernel oil, driven by warmth, light, and air, produces the stale, painty flavours that make a lot unsaleable, and it is accelerated once the kernel is sliced, ground, or roasted and its internal surfaces are exposed. The trade responds with cool storage, vacuum and modified-atmosphere packaging, and stock rotation.

Food safety sits alongside quality and is separately regulated. Almonds carry a documented aflatoxin risk originating in the orchard and in inadequately dried lots, and jurisdictions apply limits and testing to kernels entering their markets. Kernels destined for some markets also undergo mandatory pasteurisation treatments following salmonella outbreaks traced to the commodity — a requirement that applies to the kernel, not to the in-shell nut, and that varies by jurisdiction.

Kernels are eaten whole as a snack, roasted and salted or plain, and used across confectionery and bakery as whole nuts, slices, slivers, dice, flour, and paste — marzipan being the classic. Almond butter and almond-based drinks have grown into major outlets that consume kernels in bulk. Almond oil, pressed from kernels, is a small culinary and cosmetic product.

• Food — whole kernels as a snack and as an ingredient in confectionery and bakery
• Food — sliced, slivered, diced, blanched, and ground forms, including flour and paste
• Beverage — almond-based drinks made from kernels in bulk
• Oil — almond oil for culinary and cosmetic use