Okay so let me tell you my dumb knife sharpening adventure today. You know how that little paring knife gets dull as heck just cutting onions? Mine was practically crying for help. Didn’t feel like buying another one or some fancy sharpener gizmo. Figured, heck, I’ve got stuff at home right? Let’s try that coffee mug trick folks talk about.
First thing, grabbed my dullest knife – the one that squishes tomatoes instead of slicing ’em. Felt pretty useless. Fumbled through the cupboard looking for an old mug I don’t care about much. Found one with a rough, unglazed ring around the bottom. That’s the magic spot everyone mentions.

Setting up:
- Plonked the mug upside down on the counter. Needed it to stay put.
- Wrapped a kitchen towel around the base. That sucker wasn’t gonna slide.
Alright, knife time. Took the knife in my right hand. Held the handle pretty firmly. Placed the blade edge against that rough ring on the bottom of the mug. Started pushing it gently at an angle – kinda like I was trying to shave a thin layer off the mug, but really just sliding the edge along.
Angle is everything, seriously:
- Kinda guessed it, maybe like 15 degrees? Didn’t bust out any protractors.
- Kept it consistent angle… well, tried my best anyway. You can feel it catch if it’s flat.
Started making steady, smooth strokes. Pulled the knife towards me along that rough ceramic ring. Did one side first. Swish, swish, swish… maybe 15 times? Lost count. Felt weird at first, like nothing was happening.
Flipped the knife over and did the other side the same number of strokes. Repeat: push, slide, pull. Tried to use the whole length of the blade edge each time. My arm was getting tired! Who knew sharpening was a workout?
Thought to myself, “Did I just waste 10 minutes?” Picked up a stupid piece of printer paper. Held it loosely and gave the knife a gentle pull. Sliced right through like butter! Did it again, same thing. Felt like a minor miracle.
Just to test it properly:

- Grabbed a tomato. Pre-sharpening, it would have looked like a murder scene. Took the knife, pressed gently – WHOOSH. Clean slice. Minimal juice.
- Tried an onion peel with the tip – way easier, felt snappy.
Stuck the knife back in the block, feeling pretty smug. Mug trick actually works for home quick-and-dirty. Didn’t fix the big chef knife I ruined last summer, but that little guy? Feels sharp enough for duty again. Total time? About 15 minutes, including hunting for the dang mug.