No Plastic, No Guesswork: What's In Your Cutting Board

Written By Cody Lester

I get asked about this constantly at in person craft shows. People are increasingly wary of plastic in the kitchen, and for good reason. Here's a plain explanation of why wood is the better choice, and exactly what's in mine, so you're not just taking my word for it.

Why Move Away From Plastic

Plastic cutting boards shed microplastics every time a knife touches them. This isn't a fringe concern. A 2023 study published in Environmental Science & Technology found that chopping on a polyethylene board can expose a person to somewhere between 7.4 and 50.7 grams of microplastic per year, and a polypropylene board can run even higher. Every knife stroke carves tiny grooves into the plastic, and those grooves shed particles directly into whatever you're cutting.

Worth being straight with you here: wood boards shed particles too, and some research has actually found wood sheds more particles by count than plastic in certain tests. The difference that matters is what those particles are. Wood particles are natural cellulose fiber, the same material as the wood itself, and they break down like any other organic matter. Plastic particles are a synthetic polymer that doesn't break down and accumulates in the body over time. Switching to wood doesn't mean zero particles. It means the particles you're exposed to are wood, not plastic.

The Wood

I build primarily in black walnut, hard maple, white oak, and cherry, kiln dried and untreated. No chemical additives, no coatings baked in before it reaches me. (I've got a separate post coming that goes deeper on the woods themselves, if you're curious about grain, character, and why I chose these.)

A Note on Walnut and Juglone

A few people have asked me whether walnut is toxic, and there's a kernel of truth behind the question. Walnut trees produce a compound called juglone, which is why you'll sometimes hear that other plants struggle to grow near a walnut tree, or that pets shouldn't chew on fresh walnut branches, bark, or hulls. Both of those things are true.

What doesn't carry over is the toxicity. Juglone is concentrated almost entirely in a living tree's roots, hulls, and leaves. By the time wood is milled into heartwood lumber and kiln dried, the juglone left behind is negligible, which is exactly why walnut heartwood isn't restricted for food contact. The concern that's real for a living tree or fresh green wood doesn't carry over to a finished, cured piece sitting on your counter.

The Glue

Where pieces are joined, I use Titebond III. It's FDA approved for indirect food contact once cured, meaning it's rated safe in the way it's actually used here: inside a joint, not on the surface your food touches. By the time a piece reaches you, that glue has cured for days, well past the 24 hours it needs to fully set.

If you'd still rather avoid glue joints entirely, my cheese slicers and charcuterie boards are cut from a single piece of solid wood with no glue lines at all. Worth noting these are built as serving pieces, not everyday cutting boards. A single-piece board is fine for something that's mostly on display and occasionally washed, but it's a poor choice for a board getting wet daily, since wide solid wood expands and contracts unevenly with moisture and is more prone to warping over time. That's part of why my actual cutting boards are glued up from narrower strips instead of cut from one solid piece.

The Finish

I finish everything with Bumblechute's Woodworker's Oil, made from fractionated coconut oil, lemon oil, and vitamin E. The ingredients are well-established food-safe substances, the kind the FDA classifies as GRAS, generally recognized as safe. Like most small-batch wood finish makers, Bumblechute's doesn't carry a separate third-party certification on top of that, since none is required for ingredients already recognized as safe.

For care and reoiling at home, two good options: Walrus Oil, or Bumblechute's Hydrating Wood Serum, which is made with fractionated coconut oil instead of mineral oil. Both are food-safe and well suited for maintaining a board. I keep Bumblechute's on hand as an add-on if you'd like one, though both are available to source on your own as well. I'm shifting my own shop finish toward Bumblechute's going forward, so you may see both names referenced depending on when your piece was made.

If your routine ever calls for a plain mineral oil top-up, food-grade mineral oil is classified by the FDA as GRAS, generally recognized as safe. It starts out as a petroleum product, but the food-grade version is refined specifically to meet food-contact standards. That's a different thing from the industrial mineral oil people are usually picturing when they raise a concern.

Skip cooking oils like olive oil entirely. They're non-drying, so they don't fully absorb and set the way a proper wood finish does. Over time they go rancid inside the wood, which leads to off smells and a sticky surface.

On Epoxy

Occasionally a piece has a small natural void or knot that needs filling to keep moisture out. When that happens, I use TotalBoat epoxy, applied only to the inner or outer edge of the piece, never anywhere a blade would touch. Worth knowing: no epoxy, food-safe or not, holds up to direct knife contact. It's harder than wood, and a blade will chip or shave it rather than glide across it. Any board sold with epoxy across the actual cutting surface should be treated as a serving piece, not something to chop on. My use of it stays confined to sealing small edge voids, well clear of where a knife ever goes.

Questions

If you're weighing a purchase and have a specific concern I haven't covered here, reach out. I'd rather answer directly than have you guess.

Sources

Cody Lester
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Spring 2026: Where Things Stand at The Fine Grainery