
Few side dishes deliver the kind of satisfaction that comes from a genuinely crispy roast potato — shatteringly crunchy on the outside, fluffy and steaming within. The secret here is a two-step process: parboiling the chunks until their edges go ragged, then shaking them dry in the pot to rough up the surface before they ever hit the oven. That shaggy, starchy exterior is what turns into pure golden crunch once it meets a screaming-hot pan of fat. Duck fat, goose fat, or beef tallow each bring a deep, savory richness, but a good olive oil works beautifully too, so you can tailor it to what you have on hand. Crushed garlic cloves and fresh rosemary or thyme tucked alongside the potatoes perfume the whole tray as they roast, adding an herby, aromatic backdrop without overpowering the main event. Because this recipe is built entirely from whole, straightforward ingredients — potatoes, fat, salt, pepper, and a few optional aromatics — there's no need to scan labels or worry about hidden additives sneaking in. These are the kind of potatoes that disappear from the serving dish before you've even sat down.
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Preheat the oven to 425°F (220°C). Place the fat in a large rimmed baking sheet and set it in the oven while it preheats.
Place the potato chunks in a large pot, cover with cold water by at least 1 inch, and add the kosher salt. Bring to a boil over high heat, then reduce to a vigorous simmer and cook for 10–12 minutes, until the edges are just beginning to look ragged and a knife tip meets slight resistance at the center — the potatoes should not be fully cooked through.
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