7 Best Knife For Cutting Sweet Potatoes | Stop Mashing Spuds

Check Price on Amazon

The TUO Nakiri’s flat, straight edge and tall blade profile make it the most natural fit for sweet potato prep. At 6.5 inches, the blade length is ideal for drawing straight down through a halved tuber without any sawing motion. The German high-carbon stainless steel (rated 56±2 HRC) holds a sharp edge through multiple prep sessions and resists chipping even when you hit the occasional patch of stubborn skin.

The Pakkawood handle is ergonomically contoured and polished at the bolster for a pinch grip that stays secure. At only 8.16 ounces, the knife feels light and nimble, reducing forearm fatigue during bulk chopping. The wood composite handle is also moisture-resistant and will not warp over time — a practical feature for a knife that handles wet, starchy vegetables.

While the straight edge excels at push-cutting sweet potatoes, it is less suited for rock-chopping herbs or garlic. But for its intended job — clean, straight cuts through dense vegetables — this knife outperforms options costing significantly more. The included luxury box and lifetime guarantee add further confidence.

Check Price on Amazon

The Mercer Genesis Nakiri delivers professional-grade build quality without crossing into enthusiast pricing. Its 7-inch blade is precision-forged from high-carbon German steel with a taper-ground edge that gives noticeably better efficiency when cutting through thick sweet potato slabs. The 56+ HRC hardness ensures the edge stays sharp for extended use, and the full-tang construction provides a solid, balanced feel in the hand.

The Santoprene handle is where Mercer excels — the ergonomic, slip-resistant grip stays comfortable even with wet or greasy hands, making it a solid choice for meal-prep sessions where you are handling oil-coated vegetables. At just 4 ounces, it is remarkably light, which helps maintain control during prolonged chopping without wrist strain.

The only drawback is the plain edge design, which offers no food-release dimples. Sweet potato slices may occasionally stick to the blade, requiring a quick wipe between cuts. But for a forged, professionally-rated nakiri at this tier, the edge retention and straight-slice performance are outstanding.

Check Price on Amazon

The TUO Santoku’s hollow-ground Granton edge is the primary reason it makes this list. Those oval dimples along the blade create air pockets that prevent starchy sweet potato slices from sticking to the steel — a common frustration when using a standard chef’s knife. At 7 inches, the blade is long enough to cut through large tubers in one pass, and the 15-degree V-sharp edge requires minimal downward force.

Made from German high-carbon stainless steel rated at 56+ HRC, the blade resists corrosion well and holds its edge through steady use. The Pakkawood handle is ergonomically shaped with a non-slip profile, allowing a natural pinch grip that reduces wrist fatigue. The polished bolster area is comfortable for extended cutting sessions.

The curved belly of the santoku profile does introduce a slight rocking angle compared to a flat nakiri edge, which can cause the blade to stall if you try a pure push-cut through a very hard sweet potato. But for cooks who also need a knife for mincing garlic or dicing onions, this Santoku offers the best compromise between versatility and sweet potato performance.

Check Price on Amazon

If you want a single knife for your whole kitchen that can still handle sweet potatoes well, the Sunnecko 8-inch chef knife is the strongest candidate. Hand-sharpened to a precise 12-15 degree angle per side, the blade is exceptionally thin behind the edge, which allows it to glide through sweet potato flesh with noticeably less resistance than a typical European chef knife.

The high-carbon stainless steel blade is forged and full-tang, providing excellent balance. The laser-etched pattern on the blade not only looks refined but also reduces friction and food sticking — a subtle but real benefit when slicing starchy root vegetables. The ergonomic Pakkawood handle fills the hand naturally, and the included PVC sheath adds safe storage between uses.

For cooks who prefer a rocking motion, this knife is a delight. For pure push-cutters, the belly may cause incomplete slices on very thick sweet potatoes. Still, for versatility across meats, fruits, and hard vegetables, this is the most capable all-rounder on the list.

Check Price on Amazon

The SYOKAMI 7-inch cleaver combines the broad face of a Chinese chef’s knife with a 14-16 degree bevel per side for razor-sharp utility. The wide blade provides plenty of knuckle clearance, which is especially useful when chopping through large, round sweet potatoes that might otherwise roll under a narrower blade. The high-carbon German steel is full-tang and rated at 56+ HRC, so it resists chipping even during forceful cuts.

One unique addition is the integrated herb stripper with three holes in the blade spine — a clever touch that lets you strip kale, basil, or rosemary leaves without switching tools. The wenge wood handle has a subtle gear-tooth texture near the bolster, providing a non-slip grip even when wet. This makes it a solid choice for home cooks who want a versatile tool that can handle both bulk vegetable prep and delicate herb work.

The broad blade face does add weight, making it slightly heavier than a dedicated nakiri. And while the straight edge excels at push-cutting sweet potatoes, the cleaver profile may feel awkward for cooks used to a slim European chef knife. But for those who appreciate the control of a cleaver, this knife delivers clean, repeatable cuts through even the toughest sweet potato specimens.

Check Price on Amazon

The Sunnecko 7-inch Nakiri is built for the cook who demands paper-thin, even slices from their sweet potatoes every time. The double-bevel edge at 15 degrees per side ensures the blade tracks straight through the vegetable without drifting, which is a common complaint with single-bevel Japanese knives. The ultra-thin blade stock reduces resistance, allowing you to achieve consistent 1/8-inch slices without crushing the flesh.

Forged from high-carbon stainless steel, the blade features a laser-etched wavy pattern that reduces friction and helps starchy slices release easily. The ergonomic Pakkawood handle is shaped for a full grip, and the knife’s balanced weight distribution makes it feel lighter than its size suggests. The included sheath provides safe storage and edge protection.

This knife is strictly a vegetable-focused tool — it should not be used for cutting through bones or frozen foods. The thin edge, while exceptional for slicing, is more vulnerable to chipping on hard surfaces. But for sweet potato prep specifically, it is one of the most precise and effortless options available.

Check Price on Amazon

The Mercer Asian Chef’s Knife is a stamped, dual-edge cleaver designed explicitly for the hardest kitchen tasks — and cutting through sweet potatoes qualifies. The high-carbon German steel blade is taper-ground with a fine stone finish, delivering a razor-sharp edge that can handle thin or soft bones as well as heavy squash. The 6-inch blade length is compact but the broad face provides excellent knuckle clearance and scooping ability.

The Santoprene handle is ergonomically contoured and offers superior grip even with wet hands, which is a genuine safety advantage when applying force to a slippery sweet potato. At 10.2 ounces, it has some heft, which helps momentum carry the blade through dense flesh with less manual effort. The stamped construction keeps the price accessible while maintaining professional-level performance.

The primary trade-off is edge retention — stamped blades do not hold an edge quite as long as forged alternatives, so you will need to hone more frequently. The lack of a Granton edge also means sweet potato slices may occasionally stick. But for cooks who routinely prep large batches of hard root vegetables, this cleaver offers durable, reliable performance at a budget-friendly entry point.