Prep Tools

Har Gow Pleating Knife

A flat-bladed dim sum knife used to spread filling and crimp the pleats of har gow shrimp dumplings.

A har gow pleating knife is a small, flat, dull-edged blade used by dim sum chefs to scoop and smear shrimp filling onto a wrapper and then fold the signature pleats of har gow dumplings. The smooth blade also flattens dough rounds against the work surface. Its broad flat shape makes the repetitive folding fast and consistent in a busy dim sum kitchen.

The har gow pleating knife is a small, flat spatula-knife built for one of dim sum's most demanding hand tasks: shaping the translucent shrimp dumplings known as har gow. Its blade is a thin, narrow rectangle of stainless steel — roughly 15 to 20 cm long and 3 to 4 cm wide — with a deliberately blunt edge. It is not a cutter at all; it is a shaping and lifting tool, essentially a hybrid between a bench scraper and a small palette knife, sized to sit across the working palm.

What makes the tool indispensable is the wrapper it handles. Authentic har gow wrappers are made from a paste of wheat starch and tapioca, rolled thin so the cooked dumpling turns almost glassy — strong when supported correctly, but unforgiving of any puncture, snag, or drag. The knife's broad, rigid face lets the cook portion and spread the wet shrimp filling without tearing the dough, and then serves as a cradle: the folded half-moon of wrapper rests along the blade, supported in the non-dominant hand, while the dominant thumb and forefinger pinch the curved seam into the classic 7 to 12 pleats. A flexible fish spatula yields too much; a chef's knife edge snags the dough; a bench scraper is too tall and rigid to cradle the dumpling. The pleating knife is calibrated to the exact geometry of that one job.

It is a Cantonese tool of long standing, standard equipment in dim sum stations in Hong Kong tea houses and Guangzhou kitchens, and only relatively recently given a stable English name. You will see it sold as a dim sum knife, a har gow spatula, or a dumpling spatula-knife; the function is identical, and the maker matters more than the label.

Alternatives

Butter KnifeSmall Offset SpatulaBench Scraper

Types & varieties

All-metal dim sum spatula

Single-piece stamped or riveted stainless steel; durable, easy to sanitize, common in professional Cantonese kitchens.

Wooden-handle dim sum knife

Stainless blade with a short cylindrical or flat wooden handle; the style most often sold to home cooks.

Small dumpling tea-spoon style

Shorter, sometimes slightly cupped version favored by some Hong Kong dai pai dong chefs for scooping filled wrappers.

In the hand: how the knife is actually used

The har gow knife is not a knife in the Western sense — it is gripped and held more like a small flat paddle, and its effectiveness depends almost entirely on the two-handed coordination between the wrapper, the blade, and the pinching fingers.

Spread the shrimp filling (蝦膠) across the center of the round wrapper with the broad face of the blade, working in a single sweeping stroke so the dough is not dragged.
Fold the wrapper over the filling into a half-moon, then lay the dumpling seam-up along the length of the blade so it rests across the non-dominant palm.
Anchor the blade under the thumb and the heel of the hand; the dumpling sits on the steel like a small saddle, supported but not squeezed.
Pleat with the dominant thumb and index finger, pinching tiny folds along the curved seam — the blade's rigidity means each pleat can be pressed flat and tidy without the dumpling collapsing.
Slide the finished dumpling off the tip of the blade onto parchment rounds or directly into a bamboo steamer; the blunt edge lets the dumpling release cleanly.

Common uses

Portioning and spreading shrimp filling (蝦膠) evenly across a round wheat-starch wrapper.Lifting a formed dumpling off the board without tearing the delicate wrapper.Supporting the dumpling in the palm while the free hand pinches and folds the pleats.Tucking and pressing the final pleat closed to seal the dumpling.Scooping finished dumplings onto parchment rounds or directly into a bamboo steamer.

Tips & pitfalls

Lightly oil or dust the blade with wheat starch between dumplings so the wrapper never sticks and tears — this is the single most common reason home cooks puncture har gow.
Press with the broad flat face, never the edge; the tool is blunt by design, and trying to 'cut' through filling will only shred the wrapper.
Hold the knife in the non-dominant hand as a saddle under the dumpling; pleat with the dominant hand's thumb and index finger, not with the blade.
Aim for 7 to 10 visible pleats on the curved side; experienced dim sum chefs regularly produce 10 to 12, and the count is what marks a properly made har gow.
Wipe and dry the blade between dumplings, especially when working with very wet fillings like shrimp — pooled moisture is what turns wrappers gummy and tears them.
Do not substitute a chef's knife or fish spatula in a hurry: a chef's edge snags the dough, and a fish spatula's flexibility lets the wrapper fold and tear instead of slide.
Store the knife flat or hung; do not leave it sitting in water, as a wooden handle can split and even stainless steel can pit along the edge if left damp.

Good to know

Category: Dim sum prep tool, Cantonese origin
Also called: Dim sum knife, dumpling spatula-knife, har gow spatula
Blade material: Stainless steel (most common); occasionally carbon steel
Handle material: Wood or stainless steel
Blade shape: Flat, thin, rectangular with a blunt (unsharpened) edge
Typical blade length: Roughly 15–20 cm (6–8 in); narrow profile, around 3–4 cm wide
Edge: Blunt; a shaping and lifting tool, not a cutting tool
Pairing tools: Dim sum rolling pin, dough scraper, bamboo steamer, small dim sum tongs