Knives & Cutting

Floor Cutting Blade (Boti / Bonti)

Floor-mounted curved blade used seated, drawing food across it to cut and slice.

A boti is a curved, upward-facing blade fixed to a wooden or metal base that the cook holds steady with a foot while sitting on the floor. Rather than moving a knife, the cook pulls vegetables, fish, and meat across the fixed edge to slice, scale, and bone them. Common across Bengal and South Asia, it frees both hands to control the food precisely.

The boti (also spelled bonti) is one of the most distinctive stationary cutting tools in South Asian kitchens: a curved, upward-facing steel blade set into a heavy block of hardwood, designed to be used while seated on the floor. The food is drawn toward the user across the fixed edge rather than chopped with a hand-held knife, and the curve of the blade does most of the work, producing long, even slices with a single smooth pull. In that sense it is less a knife than a small, purpose-built cutting station that lives in one place and is approached the same way each time you sit down to use it.

Its importance in Bengali cookery is hard to overstate. The standard cross-sectional piece of fish used in curries, fries, and stews is literally named after the tool — the bot cut — and the shape, thickness, and bone-in character of that piece depend on the curve of the blade and the seated drawing stroke. A boti is also used for goat and mutton on the bone, and for firm produce such as raw papaya, pumpkin, and radish, where a clean long slice is wanted. While urban fish vendors increasingly do this cutting at the market, the tool remains standard in rural households and in machher bazar fish stalls from West Bengal through Bangladesh into eastern Bihar and UP.

Alternatives

Chef'S Knife & Cutting BoardCleaverMandoline

Types & varieties

Bengali household boti

Smaller, lighter base sized to be carried, stored on a shelf, and used inside the home; the most common daily-cooking form

Market (machher bazar) boti

Larger, heavier, often permanently fixed to a plank or low stool at a fish stall and used for many hours of continuous work

Vegetable boti (sabzi bonti)

Wider, shallower curve favored in some households for slicing pumpkin, raw papaya, and radish into long, even sheets

Meat-cutting boti

Heavier, thicker blade with a steeper curve, used in butcher shops for goat and mutton, sometimes with a slightly serrated working edge

Single-piece forged boti

Older rural style where blade and tang are forged from one piece of steel and driven directly into the wood, with no rivets

Rivet-mounted boti

Modern style where the blade is a separate piece bolted through the base; easier to re-sharpen and replace the blade without reworking the wood

Why a fixed, curved blade works

The geometry of the boti is what gives it its character. The cutting edge sweeps upward and toward the user in a shallow arc, so the steepest, sharpest part of the curve meets the food at the start of the stroke and the rest of the edge carries the slice through. Because the blade is anchored in a heavy wooden block, the cook's effort goes entirely into pulling the food; there is no need to push a heavy cleaver through bone or to balance a long knife while standing. The result is a controlled, repeatable cut that is particularly well suited to soft-boned whole fish, which a Western chef's knife would crush and a heavy cleaver would tend to shatter.

The Bengali bot cut on fish

The single most important use of the boti is producing the cross-sectional pieces of fish that define Bengali fish cookery. A whole fish such as rohu, katla, ilish, or pangash is laid across the base, angled roughly 30–45°, and drawn through the blade in a series of even pulls about 3–4 cm apart. The head and tail are often left on, both for presentation and because the bones hold the piece together during frying or braising. These pieces are the building blocks of machher jhol, machher kalia, doi ilish, and the everyday fish fry — a cook who has only ever seen fillets will find the shape unfamiliar, but it is the shape the recipes are written around.

Care and maintenance

A boti is a long-term purchase, and a few habits keep it serviceable for decades. The blade should be wiped clean and dried after every use, then given a thin smear of food-grade oil to prevent rust; the wooden base should be brushed free of debris, wiped (never rinsed under running water), and treated every few weeks with a thin coat of mustard oil or food-grade mineral oil. The inside of the curve is the working edge and will need regular honing with a small round or half-round file matched to its radius. Single-piece forged blades cannot easily be replaced; rivet-mounted blades can be unbolted, re-sharpened, or swapped.

Wipe the blade dry after every use, then oil lightly
Brush and wipe the wood; never soak the base
Hone the inside (concave) curve with a matched round file
Oil the base every few weeks to stop the wood drying and splitting
Re-tighten or replace rivet-mounted blades if they work loose

Common uses

Slicing whole fish (rohu, katla, ilish, pangash, pabda) into Bengali "bot" pieces for curries and friesPortioning small fish like puti or tangra with the head on for jhol and quick bhajiBreaking down goat or mutton chops on the bone for kosha mangsho and currySlicing raw papaya, pumpkin, and radish into long, even sheets for vegetable preparationsCutting coconut, ash gourd, and other firm, round produce cleanly without crushingShaving thin slices of ginger or scoring vegetables when the blade is freshly honed

Tips & pitfalls

Brace the base against your foot, a wall, or a damp cloth underneath — the most common cause of a bad cut is the base creeping backward mid-stroke
Always draw the food toward you across the curve; never press straight down, which can chip the edge and crush soft fish flesh
Keep the blade dry between uses and oil it lightly — a damp blade against a damp wood block will rust the steel and split the base over time
Oil the wooden base every few weeks with mustard oil or food-grade mineral oil to keep the wood from drying, cracking, or loosening the blade
Hone the inside (concave) curve regularly with a small round or half-round file matched to the radius of the blade; the outside of the curve is not the working edge
Hand position matters: keep the guiding fingers curled with the thumb tucked so that any slip moves the hand away from the edge rather than into it
Common mistake: treating the boti like a cleaver and using a chopping stroke — the tool is designed for a controlled draw, and chopping will damage both the edge and the food
Common mistake: washing the wooden base under running water; wipe it instead, or the base will swell and the blade mount will loosen

Good to know

Origin: South Asia, especially Bengal (West Bengal and Bangladesh); also used in Bihar, eastern Uttar Pradesh, and parts of Pakistan
Also called: Boti, bonti, bonti-bot, boti-kathi; English renderings include "floor blade" and "sitting blade"
Blade material: High-carbon or stainless steel, forged or stamped into a shallow upward curve
Base material: Dense hardwood — typically sheesham (Indian rosewood) or teak; older pieces use sal wood
Typical size: Blade 15–30 cm along the edge; base roughly 30–45 cm long, 12–20 cm wide, 5–10 cm tall
Working posture: Seated cross-legged on the floor, base braced between or against the feet, food drawn toward the body
Signature cut: The Bengali "bot" or "boti" piece — a diagonal cross-section of whole fish, often with head and tail intact
Cleaning: Blade wiped dry and lightly oiled; wood base brushed and wiped, never soaked