Duck fat potatoes are the kind of roast potatoes people talk about for days, with a shatteringly crisp shell and a soft, fluffy middle. The secret is a three part method: boil the potatoes briefly, rough up the edges, and roast them in very hot duck fat.
The whole recipe takes about 1 hour 5 minutes, and most of that is hands off oven time. Serve them at a seasonal table or a Sunday roast and expect the tray to empty fast.
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Why This Duck Fat Potatoes Recipe Works
Duck fat has a high smoking point and a rich, savory flavor, so it browns potatoes deeper than most oils. It coats every surface and fries the outside as the inside steams, which is how you get a crust that crackles when you bite it.
Boiling the potatoes before roasting softens the surface, and shaking them in the pot afterward roughens the edges into a starchy paste. Those fluffed up edges are what turn into the craggy, extra crunchy bits in the oven.
A scattering of semolina adds a gritty, golden coating that crisps like tiny breadcrumbs. Along with rosemary and flaky sea salt, it gives the potatoes a diner style finish with very little effort.
Ingredients for Duck Fat Potatoes
- 4 lb medium to large potatoes, such as Yukon Gold or Russet
- 1 tbsp salt, for the boiling water
- 2 tbsp semolina
- 1 1/2 tsp kosher salt
- 7 oz duck fat or goose fat
- 2 tsp chopped fresh rosemary
- Flaky sea salt, for serving
Potatoes. Floury potatoes like Russet or all rounders like Yukon Gold break down slightly at the edges when boiled, which is exactly what you want for a crunchy crust.
Duck fat. Look for jars of rendered duck fat near the butter or in the freezer section. Goose fat works the same way if you can find it.
Semolina. Fine semolina gives a sandy, golden crunch. If you do not have it, a tablespoon or two of cornmeal makes a similar crisp coating.
Rosemary. Chopped fresh rosemary perfumes the hot fat. Add it after the potatoes are coated so it does not burn.
Salt. You need salt in three places: the boiling water, the roasting pan, and the flakes at the end. Each layer adds a different kind of seasoning.
How to Make Duck Fat Potatoes
1. Cut the potatoes. Peel the potatoes and cut them into pieces about 3 inches across so they are large enough to stay fluffy inside.
2. Heat the oven. Set the oven to 450 degrees F, and place a heavy roasting pan on the middle rack once it is hot.
3. Parboil. Put the potatoes in a pot, cover with cold water, add the 1 tablespoon salt, and bring to a boil. Cook for about 10 minutes until just tender but not falling apart.
4. Rough up the edges. Drain the potatoes well, return them to the dry pot, and shake gently so the surfaces turn fuzzy and scuffed. Let them steam dry for 2 minutes.
5. Heat the fat. Add the duck fat to the roasting pan and heat in the oven for about 10 minutes until shimmering.
6. Add the potatoes. Carefully lower the potatoes into the hot fat and turn them with tongs so each piece is well coated.
7. Season. Scatter the semolina, kosher salt, and rosemary over the potatoes, then turn them once more.
8. Roast until crisp. Roast for 30 to 40 minutes, turning every 15 minutes, until deeply golden and crunchy. Finish with flaky sea salt.
How to Serve Duck Fat Potatoes
These potatoes are the star of a roast dinner. Serve them beside a tender slow cooker pot roast with plenty of gravy, or put them on a seasonal table next to an easy green bean casserole. Add air fryer broccoli with Parmesan for a green side and a basket of fluffy homemade dinner rolls to round out the meal.
How to Store and Reheat Duck Fat Potatoes
Let leftover potatoes cool to room temperature within 2 hours, then refrigerate them in an airtight container for up to 3 days. Reheat on a baking tray in a hot oven at 400 degrees F for 10 to 15 minutes until crisp and hot to 165 degrees F. Avoid the microwave, which makes the crust soft. Strain any leftover duck fat through a fine mesh sieve into a clean jar and keep it in the refrigerator for your next batch.
Tips and Variations for Duck Fat Potatoes
Dry the potatoes. After draining, let the potatoes steam dry for a couple of minutes so the surface can crisp rather than steam in the oven.
Use a heavy pan. A sturdy roasting pan holds heat well and keeps the fat hot when the potatoes go in.
Hear the sizzle. If the potatoes do not sizzle when they hit the fat, return the pan to the oven for a few minutes before roasting.
Do not crowd the pan. Leave space between the pieces, or use two pans so the potatoes brown instead of steam.
Turn gently. Flip the potatoes with tongs so you do not knock off the crunchy edges.
Skip the peeling. You can leave the skins on for a more rustic look, though peeled potatoes give the crispest crust.
Plan ahead. Parboil and rough up the potatoes up to a few hours before, then roast them just before serving.
Store safely. For general guidance on food safety and leftovers, see this Texas AgriLife Extension food safety brochure.
Frequently Asked Questions About Duck Fat Potatoes
How do you make duck fat potatoes extra crispy?
Parboil, shake to rough up the edges, and roast in very hot fat. A little semolina on top adds even more crunch.
Where do you buy fat for duck fat potatoes?
Many grocery stores sell jars of rendered duck fat in the meat or freezer section, and specialty butchers carry it too. Goose fat is a close substitute.
Can you reuse the fat from duck fat potatoes?
Yes. Strain it while warm and store it in a sealed jar in the refrigerator. It is wonderful for roasting more potatoes or vegetables.
Can I use olive oil instead?
You can, though the flavor and crust will be different. Use a neutral oil with a high smoke point for the ideal crisp.
Do I need semolina?
It is optional, but it adds a crunchy, golden coating. Cornmeal or fine breadcrumbs work if you cannot find it.
Duck Fat Potatoes
Equipment
- Heavy roasting pan
- Large pot
- Colander
- Tongs
Ingredients
Main Ingredients
- 4 lb potatoes medium to large Yukon Gold or Russet, peeled and cut into 3 inch pieces
- 1 tbsp salt for the boiling water
- 2 tbsp semolina
- 1 ½ tsp kosher salt
- 7 oz duck fat or goose fat
- 2 tsp chopped fresh rosemary
- 1 pinch flaky sea salt for serving
Instructions
Cooking
- Parboil. Heat the oven to 450 degrees F. Boil the potatoes in salted water for about 10 minutes until just tender, then drain and shake to roughen the edges.
- Heat the fat. Warm the duck fat in a roasting pan in the oven for about 10 minutes until shimmering.
- Coat. Add the potatoes, turn to coat in fat, and sprinkle with semolina, kosher salt, and rosemary.
- Roast. Roast for 30 to 40 minutes, turning every 15 minutes, until deep golden and crisp.
- Finish. Sprinkle with flaky sea salt and serve hot.
