Value-add · Drum roasted

Drum Roasted Cashew

Drum-roasted cashews are roasted in a rotating drum that tumbles the kernels for an even, edge-to-edge roast — the base for premium salted and seasoned snack products.

Updated August 2026 · TTQ Co. Ltd.

In short

Drum roasted cashew refers to cashew kernels roasted in a rotating drum roaster. The continuous tumbling exposes every kernel evenly to controlled heat, giving a uniform colour and crunch that flat or static roasting struggles to match. It is the standard method for producing consistent salted, spiced and snack cashews at scale, and it pairs naturally with seasoning, sugar-coating and retail packing on a value-add line.

Drum roasting is how a processor turns graded kernels into a snack product, and it is the first stage on this site where the customer is a consumer rather than another processor. The mechanics are simple; the numbers are where people get it wrong.

How the salt-medium drum works

The TTQ drum roaster is a salt-medium roaster: the drum is charged with salt and the kernels roast within it. The salt is the heat-transfer medium, not a seasoning — it holds temperature evenly and conducts it to every surface of the kernel as the drum tumbles, which is why the roast is even edge to edge in a way a hot-air or flat-bed roaster struggles to match.

Parameter	Value
Total drum charge	50 kg
— of which cashew kernels	15–20 kg
— of which salt medium	30–35 kg
Cycle time	10–15 minutes per batch
Batches per hour	4–6
Throughput of nuts	60–120 kg/h
Power	1 HP, 220V single-phase
Footprint	1.5 × 1.0 × 1.4 m
Construction	90% stainless steel

The 50 kg figure is the drum charge, not the nut load — a distinction that has produced some wildly optimistic throughput claims. Nuts are 15–20 kg of it, so hourly output is 60–120 kg of kernels and not the 200–300 kg/h that gets quoted.

Why drum roasting

Even, edge-to-edge roast

constant tumbling in a heat-carrying medium means no kernel sits still against a hot surface. Flat-bed roasting scorches the contact face before the top is done.

Batch-to-batch consistency

the salt buffers temperature swings, so a batch loaded into a drum that has just discharged behaves like the one before it. Colour consistency is what retail buyers actually audit.

Reusable medium

the salt is screened out and reused across many batches. It is a running cost, but a small one.

Low power

at 1 HP on single-phase 220V the roaster is a machine a small value-add operation can install without a three-phase supply.

Where roasting sits in the value chain

Roasting comes after grading, not before. A roasted kernel cannot be optically sorted or size-graded reliably, and roasting a mixed grade wastes heat on kernels that will be sold as pieces. Roast to order, against the grade the customer bought.

Before it

grading and colour sorting. Roast the grade you are selling — grading first.

After it

seasoning and coating on the coating machine, or straight to retail packing.

Alongside

the dicing machine, at 150–200 kg/h and 0.4 kW, for the bakery and confectionery cuts.

Shelf life

roasting drives off moisture and shortens shelf life relative to a raw kernel. Roasted product wants nitrogen-flushed packing and a shorter sales cycle.

What changes with roasting

Roasting concentrates fat and protein slightly by driving off moisture, deepens colour, and develops the aroma compounds that make the difference between a nut and a snack. It does not fix a poor kernel: scorched or broken kernels come out of the drum scorched and broken, only darker. The value added is real but it sits on top of grade, not instead of it.

Salt medium is not salting

A salt-medium roast is not the same as a salted product. The medium transfers heat and is screened off; salted cashews are seasoned afterwards, usually with an oil or brine carrier so the salt adheres. Buyers ask about this, and answering it correctly is worth doing.

Answers

Frequently asked questions

What is drum roasted cashew?

Cashew kernels roasted in a rotating drum charged with salt as a heat-transfer medium. The tumbling gives an even, edge-to-edge roast with consistent colour, which is what retail buyers audit.

How much can a drum roaster process per hour?

60 to 120 kg of kernels. The drum takes a 50 kg charge, but only 15–20 kg of that is cashew — the rest is the salt medium. At 10–15 minutes a batch and 4–6 batches an hour, that gives 60–120 kg of nuts per hour, not the 200–300 kg/h sometimes quoted.

Why roast cashews in a salt medium?

Salt holds and conducts heat evenly, so no kernel sits against a hot surface long enough to scorch. It also buffers temperature between batches, which is what makes colour consistent load after load. The salt is screened out and reused.

Are salt-medium roasted cashews salty?

No. The salt is a heat-transfer medium and is screened off after roasting. Salted cashews are seasoned separately after the roast, usually with an oil or brine carrier so the salt adheres to the kernel.

Should I roast before or after grading?

After. A roasted kernel cannot be optically sorted or size-graded reliably, and roasting a mixed grade spends heat on kernels destined to be sold as pieces. Roast to order against the grade the customer bought.

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