What Is a Boning Knife Used For?

This guide contains affiliate links. If you buy through them, I may earn a commission at no extra cost to you. Learn more

Most home cooks can get by for years without a boning knife. Then one day they buy a whole chicken or a bone-in pork shoulder, try to take it apart with an 8-inch chef’s knife, and find out why butchers carry a different tool. A chef’s knife is too wide to follow a bone and too long to work inside a joint. A boning knife is built for exactly that.

It’s the same rule I follow in my workshop: to follow a curved shape, you need a narrow tool with a sharp point, not a wide one. On meat, the shape you follow is the bone.

What a boning knife looks like

• Narrow blade. Much thinner from edge to spine than a chef’s knife, so it can turn inside a cut and slip between meat and bone.
• Sharp, pointed tip. Most of the work happens in the front third of the blade.
• Length of 5 to 6 inches for most kitchen use. Victorinox describes boning knives as typically 12 to 15 cm on its boning knife guide.
• A handle that grips when wet. Fat and juices make handles slippery. Textured plastic or rubbery handles are popular with butchers for that reason.

What a boning knife is used for

Deboning poultry. Taking thighs off the bone, removing the breast from the carcass, cutting out the wishbone. This is where most home cooks first use one.

Breaking down a whole chicken or turkey. Finding and cutting through the joints at the hip, the wing and the backbone.

Trimming. Cutting away fat, silver skin and sinew from tenderloins, pork loins, brisket and roasts. The narrow tip slides under silver skin without taking meat with it.

Taking meat off bones. Removing a bone from a pork shoulder or leg of lamb, cutting meat off ribs or shanks.

Processing game. Separating venison and other game into muscle groups along the seams. I go into this in detail in my guide to the best boning knife for deer.

Fish. Flexible boning knives can fillet fish, and Victorinox lists filleting among a boning knife’s jobs. A dedicated fillet knife is longer and thinner, though, and better for bigger fish.

What it’s not for: chopping vegetables, cutting through bone (that’s a cleaver or a saw), or slicing a cooked roast (that’s a slicing knife).

Flexible vs. stiff: which one do you need?

Boning knives come in different degrees of flexibility. Victorinox, for example, sells flexible, semi-stiff and stiff versions of the same 6-inch knife.

Flexible blades bend to follow the curve of a bone. That precision makes them ideal for poultry, fish and delicate trimming close to the bone. Knife Merchant’s guide to Victorinox boning knives recommends them for poultry boning, fish and fine trimming.

Stiff and semi-stiff blades give more leverage. You can push them through tough connective tissue and pry large muscles away from bone. The same guide points stiff blades toward pork, beef, heavy boning and tough joints.

A simple way to choose:

If you’re buying only one, a semi-stiff blade is the compromise. It bends enough for chicken and holds firm enough for a pork shoulder.

Curved vs. straight blades

Curved boning knives have an upswept edge toward the tip. The curve follows the contours of bones and joints and lets you remove meat in long, smooth strokes. Knife Merchant notes they’re good for poultry, red meat and irregular bone structures.

Straight blades give a long, even edge. They’re better for long, clean cuts along a bone or for trimming fat and silver skin from flat surfaces.

For home use, curved is the more common choice and the one most people find easier.

Two Victorinox boning knives to start with

Victorinox’s Fibrox Pro boning knives are the ones you’ll see in a lot of butcher shops and processing rooms. They’re inexpensive, the handle stays grippy and the steel is soft enough to sharpen easily. The two I’d look at:

The flexible curved version suits poultry, fish and close trimming. The semi-stiff curved version suits pork, beef and game. Both are 6 inches (150 mm) and rated at 55 to 56 HRC by retailers, and Victorinox lists the Fibrox Pro line as dishwasher safe.

Boning knife vs. fillet knife

They look alike and overlap a lot, but they’re tuned for different jobs.

A flexible boning knife fillets small and medium fish well. If you fish a lot or break down big salmon, a fillet knife with a longer, thinner blade makes the job easier.

Boning knife vs. chef’s knife

You can debone a chicken with a chef’s knife. People do it every day. But the chef’s knife is wider and longer, so it’s harder to turn inside the cut, and the wide blade tends to leave more meat on the bone. A boning knife is also the safer tool for this job, because you’re working with the tip in a small space instead of steering a big blade.

The reverse doesn’t work well. A boning knife is too narrow for chopping, slicing onions or cutting through a squash.

How to use a boning knife

Hold it firmly. Most people use a full grip around the handle for boning, rather than the pinch grip they use on a chef’s knife. Your hand stays behind the guard, away from the edge.

Use the tip. Short, controlled strokes with the front of the blade. Victorinox puts it well: using a boning knife is about control, not strength.

Keep the blade close to the bone. Let the edge ride along the bone rather than cutting into the meat. You’ll waste less and the cuts will be cleaner.

Follow the seams. Muscles are wrapped in thin membranes. Cutting along those natural seams separates them cleanly.

Pull meat away as you go. With your other hand, gently pull the meat back so you can see where the bone is. Keep that hand out of the path of the blade.

Keep it sharp. A dull boning knife slips, and slips are how people get cut. Hone it every few minutes on a long job.

Consider a cut-resistant glove on the hand that holds the meat. Processing rooms use them for a reason. My knife safety page covers more.

Boning knife jobs, cut by cut

Example: deboning a chicken thigh

This is a good first job for a new boning knife, and it saves money over buying boneless thighs.

1. Put the thigh skin side down, so you can see the bone running through the middle.
2. Cut along the length of the bone with the tip, just deep enough to expose it.
3. Work the tip along both sides of the bone, keeping the edge against it, and fold the meat away as you go.
4. At each end, cut around the knuckle of cartilage to free the bone.
5. Lift the bone out and trim any hard bits of cartilage left behind.

The first one takes a few minutes. By the tenth, it’s under a minute.

Common mistakes

Cutting into the meat instead of along the bone. Keep the edge angled slightly toward the bone. You’ll leave less meat behind.

Using too much force. If you’re pushing hard, you’re probably cutting into bone or the knife is dull. Find the joint or the seam instead.

Working with a dull knife. A dull edge slips off the bone and toward your hand. Hone it before you start and during long jobs.

Prying with the tip. The thin tip bends or snaps if you use it as a lever. Use your other hand to pull meat away, and let the knife only cut.

How to care for a boning knife

Wash and dry it right after use. Raw meat and fat shouldn’t sit on any knife. Hand washing is kinder to the edge, even for knives listed as dishwasher safe.

Hone it often. Soft-steel boning knives like the Victorinox respond well to a few strokes on a rod. On a big job, hone between cuts.

Sharpen a few times a year. These knives sharpen easily on a stone, a guided system or an electric sharpener. My sharpener guide has options.

Store it with the edge protected. A thin tip bends or snaps if it rattles around in a drawer.

What to look for when buying

Length: 6 inches covers most home jobs. Go to 5 inches if you mostly do chicken, or 7 to 8 inches if you break down big cuts of beef or pork.

Flex: flexible for poultry and fish, semi-stiff for a bit of everything and for game, stiff for heavy pork and beef work.

Shape: curved for most people, straight if you do a lot of trimming on flat cuts.

Handle: textured and grippy when wet. A finger guard or a molded front helps keep your hand off the blade.

Steel: softer steel sharpens faster and forgives contact with bone. Very hard steel holds an edge longer but can chip on bone.

Do you need a boning knife?

If you mostly buy boneless cuts, probably not. Your chef’s knife and kitchen shears will cover the occasional job.

You’ll get a lot of use out of one if you:

• Buy whole chickens and break them down yourself
• Trim brisket, pork shoulder or tenderloin for the smoker
• Debone thighs, legs or shoulders
• Hunt and process your own game
• Fish and clean your catch

For any of those, a $30 Victorinox will pay for itself quickly in saved money on whole cuts.