The short version

• Use food-grade mineral oil, a beeswax board cream, or fractionated (liquid) coconut oil. Any one of those is fine.
• Never use olive oil, vegetable oil, canola, or any oil you'd cook with. They go rancid inside the wood and the board will start to smell.
• Oil a teak board about once a month with regular use. Oil more often (every 1 to 2 weeks) for maple, walnut, or other cutting board woods.
• Apply oil to a clean, dry board, let it sit for 20 to 30 minutes, then wipe off whatever the wood didn't drink in.
• A pale, dry-looking, or "thirsty" board is the sign to oil it. Don't wait for a schedule, just watch the wood.

Ask five people what to put on a wooden cutting board and you'll get five different answers, and at least one of them will be wrong. Olive oil shows up a lot, mostly because it's already sitting on the counter. It's also the fastest way to end up with a board that smells faintly like a salad gone bad. Here's what actually works, why the "wrong" oils fail, and how often you really need to do this.

Why the oil matters at all

Wood is porous. Every wash pulls a small amount of natural oil and moisture out of the grain, and every dry spell in your kitchen pulls a little more. Left alone, a board dries out, and dry wood is where problems start: it goes pale, it feels rough, and eventually it cracks or warps. Oiling isn't decoration. It's refilling the grain so water has somewhere to bounce off instead of soaking in.

Teak boards need this less often than most, because teak carries its own natural oils in the grain, the same ones that let it survive years on a boat deck. That buys you a longer stretch between oilings. It doesn't buy you a pass on doing it at all.

What to actually use

Food-grade mineral oil. The standard, and for good reason: it's odorless, colorless, doesn't go rancid, and it's cheap. Get the food-grade version specifically, not the mineral oil from a hardware store, which can carry additives you don't want near food.

Board cream or beeswax conditioner. Usually mineral oil or fractionated coconut oil blended with beeswax. The wax sits closer to the surface and adds a bit of water resistance on top of the oil's job underneath. Good for a board that gets heavy daily use.

Fractionated coconut oil. This is coconut oil that's had the long-chain fatty acids removed so it stays liquid and doesn't go rancid the way regular coconut oil does. If you want something you could technically also cook with, this is the one.

Any of the three does the job. Pick based on what's easy to find, not on which one some forum insists is superior. They're all solving the same problem.

What to never use, and why

This is the part worth actually reading, because the wrong answer here doesn't just fail to help, it makes the board worse over time.

• Olive oil. It's a cooking oil, which means it's unsaturated, which means it oxidizes and turns rancid at room temperature over weeks. Rub it into a porous cutting board and you've built a rancid-oil reservoir that sits an inch from your food.
• Vegetable, canola, and other cooking oils. Same problem as olive oil. Any oil sold for cooking is the wrong oil for conditioning wood, full stop.
• Walnut or other nut oils. Beyond going rancid, this is a real allergen risk if anyone using the board has a nut allergy.
• Furniture oil or polish. Not food-safe, and not meant to touch anything you'll cut a tomato on.

The test is simple: if it's not labeled food-grade mineral oil, food-grade wax, or a fractionated oil made for wood care, it doesn't go on a board that touches food.

How often, really

Forget rigid schedules. Look at the wood instead. A board that's due for oil looks pale, feels a little rough or "thirsty" to the touch, and water might sit on the surface instead of beading up. For a teak board used daily, that's usually about once a month. For softer, less naturally oily woods like maple or walnut, expect every one to two weeks. A board that sits mostly unused, or a stand-dried board that always gets full airflow, will go longer between oilings than one that's constantly wet and wiped.

Speaking of drying: how you dry a board between oilings matters almost as much as the oil itself. A board left flat on a damp counter dries unevenly on its two faces, which is exactly the kind of stress that leads to warping. Standing it upright on a board stand gets air to both sides at once, so the wood dries evenly and holds its shape between oilings. It's a small habit that makes the oiling schedule you do keep actually count for more.

The oiling process itself

1. Wash the board and let it dry completely. Oil doesn't penetrate wet wood, it just sits on top.
2. Pour a small amount of oil onto the surface and spread it with a clean cloth or paper towel, working with the grain.
3. Don't skip the edges and the end grain. End grain (the checkerboard pattern on boards like The Block) drinks oil faster than the flat faces, since you're oiling the open ends of the wood fibers directly.
4. Let it sit for 20 to 30 minutes. Longer is fine if you're not in a hurry.
5. Wipe off anything the wood hasn't absorbed. A board that's still oily to the touch the next day got more than it needed.

That's the entire process. No special tools, no complicated ritual, just the right oil at the right time, on a board that's had a chance to dry properly between uses.

For the rest of the routine, washing, drying, and what to do with a board that's already dried out or picked up a scratch, see our full teak board care guide. And if you're shopping for your first one, the whole teak kitchen collection is built around boards and stands that pair together.