
Few side dishes deliver the kind of satisfaction that comes from a potato with a genuinely shatteringly crisp exterior and a fluffy, cloud-like center. The secret here is a two-step process — parboiling the chunks until their edges turn ragged, then shaking them dry in the pot to rough up the surface before they ever hit the pan. That textured, starchy coating is what crisps up so dramatically in the hot fat, creating a crust that actually holds its crunch on the plate. Duck fat, goose fat, or beef tallow each bring a deep, savory richness that olive oil can't quite match, though olive oil still produces a beautifully golden result if that's what you have on hand. Optional crushed garlic cloves and fresh rosemary or thyme nestled around the potatoes perfume the whole tray as they roast, adding an aromatic layer without any fuss. Every ingredient here is straightforward and naturally free from peanuts and peanut derivatives, so there's no label-reading required — just honest, whole-food cooking. These are the kind of potatoes people ask about at the table, and the technique is simple enough to repeat every single week.
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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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