Best bread knife for sourdough

A sourdough loaf out of a Dutch oven has a crust that a sandwich-loaf knife was not designed for: thick, blistered and hard, over a crumb that is soft and open. Cut it with a short or dull serrated knife and the crust shatters, the slice wanders, and the crumb compresses into a wedge.

That is the whole reason to think about the knife. A long, sharp, serrated blade crosses the loaf in one or two strokes and the slice comes away flat. The picks are ordered for someone buying a first proper bread knife, which is a different order from cheapest to most expensive.

First, check what you own

If there is already a serrated knife in your kitchen with a blade of nine inches or more, you probably do not need this page. We say so elsewhere: a “sourdough” bread knife is very often a normal bread knife with a loaf on the packaging, and it is on the list in what beginners waste money on.

Buy one if your knife is short, if it has gone dull and drags, or if you have been cutting sourdough with a chef’s knife and wondering why the crust explodes.

How we judged these

1. Blade length, first and by a distance. A round boule is eight to nine inches across; a batard is longer. A blade that cannot cross the loaf in one stroke forces you to saw, and sawing is what tears crust and crushes crumb. Ten inches is the sensible minimum for a home sourdough baker.
2. Edge pattern. Wide wavy serrations are aggressive and fast through a hard crust; fine scalloped serrations leave a cleaner face on the crumb. Both work. Coarser is more forgiving of technique, finer rewards a long stroke.
3. Offset or straight. An offset handle sits above the blade so your knuckles clear the board at the bottom of the cut. On a tall loaf that is a real convenience, not a gimmick, and it is the one design choice worth deliberately deciding.
4. Handle grip when floury. Bread knives get used with dusty, sometimes damp hands. Textured polymer grips; polished wood is prettier and slipperier.
5. What it costs against what it does. Every knife here cuts the same loaf. The expensive ones buy longevity, finish and feel. That is fine, as long as you know that is what you are paying for.

Why length matters more than anything

The mechanism of a serrated knife is that each tooth catches the crust and the length of the stroke does the cutting. Short strokes with a short blade mean the teeth keep re-entering the crust, and every re-entry chips it. A single long stroke lets the serrations do their work once and pass through.

It is why a ten-inch knife feels dramatically better than an eight-inch one on the same loaf, out of all proportion to the two inches. If you buy one thing from this page, buy length.

Wavy, scalloped, or double serrated

None of these is wrong for sourdough. The wide wavy edge is the most forgiving of a beginner’s technique, which is why the two cheapest knives here carry it and why they sit at the top of the list.

Offset handles: the one feature worth thinking about

Cut a tall boule on a board with a straight knife and your knuckles hit the board before the blade finishes the slice, so you tilt the knife and the bottom crust tears. An offset knife raises the handle above the blade and the problem disappears.

The trade is that offset feels strange if you are used to a straight knife, and it is less versatile for anything other than bread. If you bake tall round loaves and slice them on a board, it is worth it. If you slice on a rack or bake flatter loaves, it is not.

Let the loaf cool first

No knife slices a warm sourdough well. The crumb is still setting as the loaf cools, and cutting into it early compresses it into a gummy layer that reads as underbaked. Give a boule an hour or more before the first slice, and store what is left the way how to store sourdough bread sets out — cut from the middle, then push the halves together.

Slicing guides and bread slicers

A slicing guide is a slotted frame that holds the loaf and spaces the cuts. They produce even slices and they take up a surprising amount of cupboard, and they do nothing a steady hand and a long knife do not. Worth it if you slice a whole loaf for the freezer every week and want it uniform; otherwise a purchase to skip for now.

Hand-crank slicers exist and are the same argument at higher cost and greater bulk. Buy the knife first. If you have already decided you want one, our guide to bread slicing guides covers the part that catches sourdough bakers out: most of them are built for a rectangular tin and will not take a round loaf.

Keeping it sharp

Serrated edges cannot be maintained at home the way a straight blade can, which is worth knowing before you spend a lot. A cheap bread knife that goes dull in several years gets replaced for the price of a bag of flour; an expensive one goes to a professional sharpener who can do serrations. Hand-washing and a blade guard or a block slot are what actually extend the life of either.

The other blade in a sourdough kitchen is the one that scores the dough, and it is a completely different tool — a razor, not a serrated knife — best bread lames covers that side, and dough scraper vs bench scraper covers the third blade people confuse it with.