The Coffee Mug Sharpener

I own more sharpening systems than I’d like to admit: guided systems, stones, strops and a belt sharpener. But one of the handiest sharpeners in the world is probably in your kitchen cupboard right now.

Turn a ceramic coffee mug upside down. See that rough, unglazed ring on the bottom? That’s a fine ceramic hone.

  1. Set the mug on a towel so it doesn’t slide.
  2. Hold the knife at roughly the angle of its existing edge, about 15 to 20 degrees for most knives.
  3. Draw the blade across the ring, heel to tip, as if slicing a thin layer off it. Do 5 to 10 strokes per side, alternating sides.
  4. Finish with a few light passes, spine first, on a leather belt, an old pair of jeans or a piece of cardboard.

It won’t fix a chipped or badly worn edge, but it will bring a dull camp or kitchen knife back to useful in a couple of minutes. A smooth, flat river stone works on the trail too.

For a proper edge, see Sharpening & Edge Maintenance.

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