Karl Broch Jacobsen

Svendborg, Denmark · High Performance, Handcrafted Kitchen Knives

Karl Broch Jacobsen

Broch Blades

Karl Broch Jacobsen of Broch Blades is part of a new generation of European makers bringing serious technical maturity to contemporary kitchen knives at a remarkably young age. Working from Denmark, he produces Japanese-inspired blades in steels such as Apex Ultra and 135Cr3, often paired with wrought iron, damascus, and regionally sourced handle materials. The collection already carries the confidence and restraint of a far more established maker, with a clear emphasis on geometry, balance, and clean execution.

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The latest from Broch Blades

Recent work

Recent releases from this workshop. Each made by hand in extremely limited numbers.

About the maker

On the workshop

Karl Broch Jacobsen grew up in a family deeply invested in the arts, and that environment shaped him early. At eight, with his father's help, he built a small coal forge and made his first piece, a twisted picture hook. By thirteen he had taken over the family garage and built a more capable forge of his own, expanding the setup over the years with belt grinders and a power hammer. Now eighteen and working full-time as a bladesmith from Svendborg in Denmark, Karl has channelled that decade of practice into culinary knives, with Broch Blades emerging as a serious young name in European bladesmithing.

The design philosophy is performance-led and Japanese-inspired, built around carefully forged geometries rather than decorative gestures. Karl works primarily in premium carbon steels including 135Cr3 and Apex Ultra, often constructed as San Mai with various cladding materials such as Damascus and wrought iron. He prefers locally sourced European materials for the rest of the knife: oak, bog oak and masur birch appear frequently for handles and saya, grounding each piece in a regional palette. The combinations feel deliberate rather than fashionable, with each material chosen for what it brings to the finished tool.

Karl has plans to travel and train with European and Japanese masters in the coming years, which suggests where this practice is headed. For now, the work already on the bench is exceptional, with examples we have handled that read as considerably more mature than his age suggests. For Modern Cooking, Broch Blades is a welcome addition to our Collectors Selection: a young maker whose craft is grounded, whose materials are honest, and whose trajectory is one we are genuinely glad to be alongside. The knives are quietly serious, and they reward serious attention.

Steel preference

Signature construction

Cutting edge steel

135Cr3

Plain high-carbon tool steel

Typical HRC
62–65
Corrosion class
Carbon
Production
Conventional
Origin
AFNOR / DIN; closely overlaps 1.2008

Editorial note: despite the "Cr3" suffix, which superficially suggests a low-carbon case-hardening grade, 135Cr3 is in fact a through-hardening high-carbon tool steel. The name is occasionally a source of confusion when buyers see the steel listed in older catalogues alongside true case-hardening grades like 16MnCr5; in practice 135Cr3 is interchangeable with 1.2008 for kitchen knife purposes.

The editorial profile follows 1.2008: a respectable, traditional European high-carbon at 62–65 HRC, with moderate edge retention, good toughness for the hardness, and conventional patina behaviour. It is most often seen in French and German workshop production where the carbon-steel idiom is part of the maker's identity. Among the makers Modern Cooking carries, Yanick Puig, Milan Gravier, Guirec Péron, and Jonas Johnsson work in 135Cr3.

Also known as:1.2008

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Blade construction

Laminated Steel

A category covering knives built from multiple layers of different steels forge-welded together. The hard cutting steel is sandwiched between softer outer layers (cladding) that protect the core, add toughness, and often contribute visual contrast.

The most common laminated constructions in the Modern Cooking catalogue are:

SanMai (三枚) — three layers: hard cutting steel in the centre, softer cladding on both sides. The traditional and most common form.

GoMai (五枚) — five layers: a hard core, two intermediate layers, and two outer layers. Adds visual depth and structural complexity.

KuMai (九枚) — nine layers: similar logic, with more cladding layers for additional pattern and structural variation.

GoMai and KuMai are often chosen not only for the additional layers and visual depth, but also because the intermediate layers can act as a nickel diffusion barrier — limiting carbon migration out of the core into the cladding during forge welding, and protecting the core's intended carbon content through the heat of the forging process.

In all cases the cutting performance is determined by the core steel; the outer layers are cosmetic and structural. The lamination contributes corrosion protection (when a stainless jacket clads a carbon core), reduced reactivity, and the visible boundary between core and cladding that gives the knife its character.

View full construction guide →

Limited release

Reserve your place

Karl Broch Jacobsen's work is highly sought-after for its distinctive combination of craftsmanship, performance, and design, with each piece produced by hand in extremely limited numbers — a pace of production that naturally cannot keep up with demand.

For those hoping to secure a piece through Modern Cooking, joining the waitlist is the best way to register your interest in Karl's work and share your preferred dimensions, design preferences, and intended use. As opportunities become available, we use this information to guide future allocations with care and consideration.

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