Crispy Duck Fat Roasted Potatoes
These are not soft, steamed tubers. They are structured, intensely brown, and shatter upon impact. You need high heat and the right potato variety to make this work.
Texture is built in the water.
Use a starchy potato like a Russet or Yukon Gold; waxy potatoes will never give you that necessary craggy surface.
- Large heavy-bottomed pot
- Rimmed baking sheet
- Colander
- Wire whisk or fork
What goes in.
- 3 lbRusset potatoes, peeled and cut into 2-inch chunks
- 1/3 cupDuck fat, rendered
- 1 tbspKosher salt
- 2 sprigsFresh rosemary
Creating the Micro-Texture
After boiling and draining, shake the potatoes vigorously in the pot or colander until the edges look fuzzy and mashed. That fuzz is pure starch that turns into a crisp shell.
The method.
Boil the potatoes
Cover potatoes with cold, heavily salted water. Bring to a boil and cook for 8-10 minutes until a fork slides in with resistance but the centers are softening.
Rough them up
Drain the water and let the potatoes sit in the colander for 2 minutes to steam off excess moisture. Toss them firmly until the surfaces look chalky and frayed.
Heat the fat
Place the duck fat on your baking sheet in a 425°F oven. When the fat is shimmering and smells toasted, pull the pan out.
Roast
Carefully add potatoes to the hot fat, tossing to coat. Roast for 45 minutes, turning every 15 minutes, until the potatoes are a deep, dark brown.
Finish
Toss with salt and rosemary 5 minutes before removing from the oven to let the herbs crisp without burning.
Other turns to take.
Garlic-Infused
Add 4 smashed cloves of garlic to the pan during the final 10 minutes of roasting.
Duck-Free
Substitute high-quality beef tallow; the profile is heavier but the crisp remains identical.
When it doesn't go to plan.
Never overcrowd the baking sheet; if the potatoes touch, they will steam instead of fry.
If the potatoes don't look deep mahogany when the time is up, leave them in. Color is the indicator of crunch.
Use rendered fat that has been clarified to ensure it doesn't smoke too early.
The ones that keep coming up.
Can I do this ahead of time?
You can boil and rough-up the potatoes earlier in the day, but the roasting must happen right before serving to maintain the crunch.
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