I feel potatoes can sometimes be an afterthought. They are in everything — roasted, mashed, fried, baked, soupified, and casseroleed — and they just comply. Quietly waiting in your pantry to be selected. However, most people will just pull a potato out and cut it, and just throw it in the pan. No rinse, no nothing. And… okay, I can see it. They look clean most times. But, with potatoes, you should get started washing.
Why wash a potato at all?
It’s not just about the little dirt here and there (though that’s reason enough). Potatoes grow underground, and therefore they are living in soil until we harvest them. Soil can carry all kinds of stuff, from harmless dust to bacteria that you don’t want in your food.
Washing helps:
- Get rid of dirt and grit: Even if you can’t see it, there is usually still some dirt from where they were harvested and moved when we handle them.
- Wash off pesticides or chemical residue: Many potatoes undergo a treatment during growing or after they are harvested.
- Keep bacteria out of our food: Soil can carry pathogens that you’d likely not want to enter your meal prep area.
Most harmful stuff is killed in the cooking process, but washing is still your best first line of defense — you are not just making the potato truly safe to eat, you also keep your cutting board and tools cleaner.
When to wash potatoes
I used to think I should wash them right away as soon as I came home from the supermarket, but here comes the interesting part: that is not actually the best idea if you want to store them for some time. Moisture is the enemy of potato storage — it makes the potatoes moldy and rot. So, “when” depends on what you are planning.
- Before cooking: Always! Whether you are roasting them whole, chopping them for a stew, or slicing them for French fries, always wash them first.
- After you take them home from the store: You may rinse them only if you know you will be cooking them soon. It removes any grocery store residue and speeds up your cooking later on. But if you are not cooking them any time soon, you should skip the water and simply brush off the visible dirt.
- If they have been stored for a while: Sometimes, stored potatoes just accumulate a little more dust or start sprouting. You should wash them at this stage before cooking.
How to wash them (especially without overthinking)
You do not need anything fancy — you just need some attention and the right technique!
- Get your washing tools: A small kitchen brush, or even a clean dish brush, works just fine. Fill a bowl with cold water or use running water from the sink.
- Scrub them gently: Hold the potato under the water and scrub in small circles. Focus on areas with grooves, eyes, or rough textures, as these are popular hiding places for dirt.
- Rinse well: After scrubbing, provide a final rinse under running water to wash off anything loosened up by the scrubbing brush.
- Dry thoroughly: Either pat dry with a clean towel or use paper towels. Dry skin helps for roasting, frying, and even boiling because wet potatoes could steam instead of crisp.
Why you should not wash before you store them
Here’s the science side: potatoes store best when they are dry, meaning moisture on the skin creates the perfect little breeding ground for mold and bacteria. The mold and bacteria will break down the potato and make it soften, spot, and eventually rot.
Instead, store unwashed potatoes in:
- A cool space (but not the fridge, as cold temperatures can create flavor and texture changes).
- A dark space (exposure to light will cause the potatoes to sprout or turn green).
- A dry space with some air movement (like a basket or brown bag, not sealed in plastic).
You’ll also want to keep potatoes away from onions, as the gas emitted by onions will spoil them more quickly.
What if you are peeling them?
If you are going to be peeling the potatoes before cooking them, do you still need to wash them? Technically, you could skip the washing since you are pulling the skin off anyway. But rinsing right before peeling has a couple of benefits:
- It reduces the dirt from getting onto your hands and possibly into the potato flesh.
- It reduces the risk of getting dirt or grit in your potato peeler, keeping it sharper and cleaner.
It’s just one of those extra 30 seconds that makes the rest of your prep that much cleaner and easier.
Extra tips for cleaner, better potatoes
- Use a veggie brush: Don’t just grab the sponge sitting in your sink — it can hold soap and bacteria.
- Remove green spots if you find them: If the skin has green areas, cut them off — they can taste bitter and, in larger quantities, be mildly poisonous.
- Soak them before scrubbing: If they are really dirty (farmers’ market scores, I’m looking at you), fill a bowl with water and let them soak 10–15 minutes to loosen the dirt.
- Wash even pre-washed potatoes: Some potatoes will be labeled pre-washed, but they can still pick up dust or bacteria depending on how long they’ve been in transit.
A small habit with big results
Washing potatoes does seem like one of those little prep habits you can skip without consequence — and yes, at times you will be okay skipping it. But it’s that simple habit over time that makes a difference: it keeps your cooking space cleaner, your food free of random grit, and harmful bacteria out of your meals.
For me, once I started doing it without thinking, it became second nature: grab the potatoes, scrub, dry, cook. No thinking involved.
So, next time you’re going to drop a potato into boiling water, give it a quick scrub first. Your taste buds will not notice the difference, but your kitchen hygiene will.
