The Best Ways to Sharpen Knives, According to Chefs and Knife Experts

We checked in with chefs and experts about the best ways to sharpen a knife — from easy DIY tips to more professional methods.

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Photo: RazoomGames/Getty Images

"I like the Japanese knives, I like French knives. Whatever's sharp," Wolfgang Puck once said in an interview with L.A. Weekly. Knives are essential tools in every kitchen, but what do you do when yours start to lose their edges? We checked in with chefs and experts about the best ways to sharpen a knife — from easy DIY tips to more professional methods.

Do It Yourself

For those who prefer a DIY approach to knife sharpening, Claudia Sidoti, head chef at HelloFresh, has a few ideas to share, the first of which is using a piece of sandpaper: "The best size will depend on the knife and how much you want to sharpen it," Sidoti says. She suggests starting with a coarser sandpaper and working your way up to a finer piece for maximum sharpness. Another of her methods is using a nail file, running the cutting edge of the knife blade against it.

In a pinch, you can also grab a mug for sharpening. "Turn the mug upside down, find the raw part of the cup (the rougher part of the bottom), and run the knife across the mug until you get your desired edge," Sidoti says. She says that you will notice discoloration on the mug, which means the ceramic is removing steel and sharpening the blade.

Chef Jeff Osaka from Colorado's Empire Lounge and Restaurant is also a proponent of the mug method — he recommends slowly pulling the edge of the knife at about a 45-degree angle along the unglazed area. Private chef Nicholas Tang learned a similar technique from his grandmother, using the unglazed base of a porcelain bowl instead.

"If I'm stranded with a painfully — and dangerously — dull knife, say in an Airbnb, I use the non-sharp edge of one knife as a 'steel' to sharpen the sharp edge of another," explains Chef Mary Sue Milliken of Border Grill in Las Vegas and Los Angeles. "Hold the sharp edge at a 15-degree angle to the dull edge and give each side a few swipes. It always makes the knife better — but never makes it a sharp knife."

Tools of the Trade

"The easiest way to sharpen a knife is to use a knife sharpener," says Executive Chef Fabio Capparelli from True Blue Butcher and Table in Wilmington, North Carolina. "I personally use an electric one that is called Work Sharp, the Knife & Tool Sharpener, Ken Onion Edition. It is very easy to use, and you can adjust the sharpening belt to the angle that is required for your knife."

Like a Pro

"For those who are up for the art that is knife sharpening, love rolling up their sleeves and learning a new craft, I'd recommend DMT's DuoSharp Bench Stone in the extra fine/fine grit, assuming your knives aren't blunt objects that need a lot of sharpening work," says Eunice Byun, co-founder and CEO of Material. Byun adds that the stone can be used on a multitude of different knife shapes and sizes.

Executive Chef Garrett Merck from The Ballantyne Hotel in Charlotte, North Carolina, explains, "All sharpening works the same, regardless of the type of stone used. You will guide the knife down the stone at your desired angle multiple times. It is essential, however, that each stroke is the same — as in, same stroke pattern and pressure. The angle that you put on a knife is referred to as a bevel. If you desire a sharp knife, your angle will be much lower, as in a 15-degree as opposed to a 25-degree. If you are looking for a long-lasting edge, increase the angle."

Learn from the Pros

Korin hosts knife sharpening classes at its flagship in New York City, taught by in-house expert Vincent Lau; there's an online video series, too. Director of Food and Beverage Severin Nunn of The Omni PGA Frisco Resort in Frisco, Texas, says, "Korin has a great video series on how to sharpen knives. I recommend watching the video multiple times."

If you would rather leave knife sharpening to the pros, Chef Erik Niel from Easy Bistro & Bar and Main Street Meats in Chattanooga, Tennessee, suggests calling Coutelier in New Orleans or Nashville and sending your knives in to be professionally sharpened. "They are amazing, and the only people I trust to fix or sharpen my knives."

When it comes to DIY, using a tool of the trade, or sharpening like a pro, Eunice Byun reminds us, "Regardless of which route you choose, keeping your knives sharp is critical so don't get swept up by which method. Just do what works for you and keeps those blades razor sharp."

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