Knife Skills: Grip, Cuts, and Why Size Matters

A knife is three tools, not one

The heel (nearest the handle) is where your force lands, so it handles hard things. The middle does most of the slicing. The tip does fine work — mincing garlic, scraping seeds out of a chilli. Trying to do everything with one section wastes effort and hurts your wrist.

The pinch grip: hold the blade, not the handle

Pinch the base of the blade between thumb and index finger, and wrap the other three fingers around the handle. Control at the tip improves immediately, for a simple reason: the centre of rotation moves from your wrist to the blade itself.

It feels wrong for the first couple of days. After that you will not go back.

The claw hand

Curl the fingertips of your guiding hand inward so your nails face the blade. The knife rides against your knuckles while the fingertips hide behind them. Keep that shape and cutting yourself becomes very unlikely.

The blade leans on those knuckles and slides along them. As the hand retreats, the knife retreats with it.

Four cuts that cover most cooking

• Slices: lay the item flat, keep the thickness even. Garlic, ginger, potato.
• Julienne: slice first, then stack the slices and cut down through them. Even slices are the only route to even matchsticks — the texture of Japchae is decided here.
• Dice: cut the matchsticks crosswise. This is the size at which ingredients hold their shape in a braise.
• Mince: keep the tip planted on the board and rock the handle. It is a lever, not a chopper.

Uniform size is a cooking decision, not a cosmetic one

Everything in the same pot cooks for the same length of time. Cut unevenly, and some pieces are raw while others have dissolved. In particular, long cooking wants large pieces. Kedjenou quarters its onions; Iraqi Dolma uses vegetables whole. Cut them small and there is nothing left to chew after an hour.

The inverse also holds: a five-minute stir-fry like Jeyuk Bokkeum needs thin, even pieces. The shorter the cooking, the more the knife work has to be right.

None of it works with a dull knife

A dull blade does not cut, it crushes. Tomatoes turn to pulp, onion cells rupture and release more of the sharp compounds, and — most importantly — you push harder, so when it slips you get hurt badly. The idea that a dull knife is safer is simply false.

Put it on a stone or a rod once a month. Most of the time the difficulty is not your technique; it is the edge.