How to Care for Your Walnut Cutting Board
A well-made walnut cutting board isn’t a kitchen tool — it’s an investment. Treated right, it will outlast the kitchen it lives in. Treated wrong, even the best board will crack, warp, and dry out within a year. The good news: proper care takes about five minutes, a few times a year.
The Enemy: Water
Wood and standing water are not friends. Never submerge your cutting board, never put it in the dishwasher, and never let it sit in a puddle of water on your counter. Water penetrates the wood unevenly, causes the fibres to swell at different rates, and that’s what causes warping and cracking.
After use, wipe your board clean with a damp cloth. For stubborn smells (garlic, onion), sprinkle coarse salt on the surface, rub with half a lemon, let sit for a few minutes, then wipe clean. Rinse briefly and dry immediately — standing upright if possible so both sides dry evenly.
The Friend: Mineral Oil
Food-grade mineral oil is the single most important thing you can do for your board. It penetrates deep into the wood fibres, displacing moisture and creating a barrier against water penetration.
Every Studio 5 board arrives fully saturated — we submerge each board for 7 to 10 days, watching closely until the wood completely stops drawing in oil. That’s how we know it’s ready. Most cutting boards get a quick wipe of oil and ship the next day. Ours don’t leave the shop until the wood has reached full saturation — it’s the difference between a board that’s protected on the surface and one that’s protected all the way through.
But over time, with regular use and washing, that oil depletes. Here’s how to top it up:
- Make sure the board is clean and completely dry
- Apply a generous amount of food-grade mineral oil to all surfaces — top, bottom, and all four sides
- Let it soak in for at least 2 hours, or overnight if possible
- Wipe off any excess with a clean cloth
Do this every 2–3 months with regular use, or whenever the wood starts to look dry or lighter in colour. A well-oiled walnut board has a deep, rich chocolate tone — when it starts looking pale, it’s telling you it’s thirsty.
The Finishing Touch: Beeswax
After oiling, a coat of food-safe beeswax seals everything in and gives the surface a subtle sheen. Apply a small amount with a cloth, let it sit for 10–15 minutes, then buff lightly. Clapham’s Salad Bowl Finish is what we use and recommend — it’s Canadian-made, food-safe, and excellent.
Storage
Store your board flat or standing upright — never leaning at an angle for extended periods, as this can cause warping over time. Keep it away from direct heat sources like stovetops and dishwasher vents.
When to Re-sand
If your board develops deep knife grooves or staining that won’t come out, a light sand with 180-grit sandpaper followed by a full re-oil will bring it back to near-new condition. This is one of the great advantages of a solid wood board — it’s fully renewable.
The Bottom Line
Oil it. Wax it. Keep it dry. Do that, and your walnut cutting board will be something your kids argue over someday.