Crispy Duck Fat Roast Potatoes
Crispy Duck Fat Roast Potatoes is a medium British recipe that serves 6. 340 calories per serving. Recipe by Chef Jack Ovens on YouTube.
Prep: 30 min | Cook: 1 hr 30 min | Total: 2 hrs 20 min
Cost: $13.75 total, $2.29 per serving
Ingredients
- 1.5 kg High-Starch Potatoes (peeled, sliced and quartered; smaller pieces get crispier)
- 5 g Baking Soda (helps extract pectin for extra crispness)
- 1 tsp Salt (pinch for the boiling water)
- 80 g Duck Fat (can substitute goose fat or beef tallow)
- 10 g Fresh Rosemary Leaves (for rosemary salt; about 2 tbsp loosely packed)
- 2 tbsp Sea Salt Flakes (coarse flakes for rosemary salt)
Instructions
Prepare the potatoes
Peel the potatoes, slice them into quarters (smaller pieces will become crispier).
Time: PT10M
Parboil with baking soda
Bring a pot of water to a boil, add 5 g baking soda and a pinch of salt, then add the potatoes. Cook for 15 minutes until just tender.
Time: PT15M
Temperature: 100°C
Drain and fluff
Drain the potatoes in a colander, let them steam dry for a minute, then fluff with a fork so they stay separate.
Time: PT5M
Heat the duck fat
Pre‑heat the oven to 190 °C. Place 80 g duck fat in the roasting dish and heat for about 15 minutes until the fat is smoking hot.
Time: PT15M
Temperature: 190°C
Roast the potatoes
Carefully transfer the fluffed potatoes onto the hot fat (do not pour). Roast for 1 hour, turning the tray every 15 minutes for even browning.
Time: PT1H
Temperature: 190°C
Make rosemary salt
While the potatoes roast, place 10 g rosemary leaves and a couple of big handfuls of sea‑salt flakes in a mortar. Pound until the rosemary turns a bright green paste.
Time: PT5M
Finish and serve
Remove the potatoes from the oven, let them rest for 5 minutes, then toss them in a bowl with the rosemary‑salt mixture until evenly coated. Serve immediately.
Time: PT5M
Nutrition Facts
- Calories
- 340
- Protein
- 4 g
- Carbohydrates
- 45 g
- Fat
- 12 g
- Fiber
- 4 g
Dietary info: Gluten-Free, Paleo
Allergens: Duck
Ingredient Substitutions
- Instead of High-Starch Potatoes: Yukon Gold potatoes, Idaho potatoes
- Instead of Duck Fat: Goose fat, Beef tallow
- Instead of Fresh Rosemary Leaves: Dried rosemary (use half the amount)
- Instead of Sea Salt Flakes: Kosher salt, Fleur de sel
Equipment Needed
- Large Pot
- Colander
- Roasting Dish
- Mortar and Pestle
- Mixing Bowl
- Tongs
- Heat‑Resistant Surface
Critical Steps — Do Not Skip
- Parboiling potatoes with baking soda
- Heating duck fat until smoking hot
- Roasting and turning potatoes every 15 minutes
- Pounding rosemary into a green salt paste
Chef Tips from the Video
- Use a cast‑iron skillet instead of a roasting dish for even heat distribution.
- For extra flavor, add a smashed garlic clove to the fat while it heats.
Troubleshooting
Potatoes are soggy instead of crispy.
Make sure the duck fat is smoking hot before adding the potatoes and turn them every 15 minutes. Also, avoid overcrowding the pan.
Potatoes break apart during roasting.
Fluff them gently after draining and handle them with tongs; turn them carefully to keep pieces intact.
Rosemary salt is too coarse.
Continue pounding in the mortar until the rosemary is fully broken down; you can add a pinch of fine sea salt to help the texture.
Storage
Refrigerator: Store in an airtight container for up to 3 days; reheat in a hot oven to regain crispness.
Freezer: Not recommended – freezing makes the potatoes soggy.
Room temperature: Best served the same day; can sit out for up to 2 hours.
Make-Ahead Tips
- Parboil the potatoes a day ahead, drain and store them in the fridge; roast when ready.
- The rosemary‑salt blend can be prepared up to 3 days in advance and kept in a sealed jar.
Frequently Asked Questions
What is the cultural significance and history of duck fat roasted potatoes with rosemary salt in British holiday cuisine?
Crispy roasted potatoes are a staple of British Christmas dinner, often cooked in goose or duck fat for extra richness. The addition of rosemary salt reflects traditional herb‑infused seasonings used in festive feasts across the UK.
What are the traditional regional variations of roasted potatoes in British cuisine?
In Scotland, potatoes are sometimes boiled with butter before roasting; in England, goose fat is the classic fat of choice. Some regions add herbs like thyme or sage, while others sprinkle malt vinegar for a tangy finish.
How is duck fat roasted potatoes with rosemary salt traditionally served during Christmas in the United Kingdom?
They are typically served hot, arranged on a large platter alongside roast turkey, Brussels sprouts, and gravy. The potatoes are often the centerpiece of the vegetable side because of their golden crunch.
What occasions or celebrations is duck fat roasted potatoes with rosemary salt associated with in British culture?
Besides Christmas, the dish appears at New Year’s Eve, Easter lunches, and any special family gathering where a luxurious side is desired.
What makes duck fat roasted potatoes with rosemary salt special compared to regular roasted potatoes in British cuisine?
Duck fat has a higher smoke point and richer flavor than ordinary oil, giving the potatoes an unmatched depth. The rosemary‑salt crust adds aromatic freshness that elevates the classic dish.
What are the authentic traditional ingredients for duck fat roasted potatoes with rosemary salt versus acceptable substitutes?
Traditionally the recipe uses high‑starch potatoes, duck fat, fresh rosemary, and sea‑salt flakes. Acceptable substitutes include goose fat or beef tallow for the fat, and kosher salt or fleur de sel in place of sea‑salt flakes.
What other British dishes pair well with duck fat roasted potatoes with rosemary salt?
They pair beautifully with roast turkey, beef Wellington, honey‑glazed carrots, Brussels sprouts with bacon, and classic gravy or mint sauce.
How does the YouTube channel Chef Jack Ovens specialize in cooking?
Chef Jack Ovens focuses on elevated home‑cooking techniques, often highlighting classic comfort foods with a gourmet twist, such as using specialty fats and precise temperature control.
What is the cooking philosophy and style of the YouTube channel Chef Jack Ovens?
Chef Jack Ovens emphasizes mastering fundamentals—proper seasoning, temperature management, and ingredient quality—while keeping recipes approachable for home cooks.
What are the most common mistakes to avoid when making duck fat roasted potatoes with rosemary salt?
Common errors include adding potatoes to cold fat, overcrowding the pan, and not turning the potatoes regularly. Also, using too little baking soda will reduce the crispness.
How do I know when duck fat roasted potatoes with rosemary salt are done cooking?
The potatoes should be golden‑brown and crackly on the outside while remaining fluffy inside. A fork should slide in easily, and the rosemary‑salt coating should be evenly adhered.
Last updated: September 1, 2026
