Crispy Duck Fat Fries with Spiced Ketchup

If a great French fry is a small luxury, a duck fat fry is a full indulgence. Frying in rendered duck fat — the secret of the best Belgian and French bistros — gives potatoes an incomparable savory richness and an extra-crisp shell. Double-cooked for a fluffy interior and a shatteringly crunchy exterior, and served with a spiced homemade ketchup, these are the fries you make when ordinary just won't do. They are worth every bit of the splurge.

Why Duck Fat

Duck fat is the upgrade that changes everything. It has a high smoke point, so it fries hot and crisps potatoes beautifully, and it carries a deep, savory flavor that soaks subtly into every fry — a richness that vegetable oil simply cannot deliver. It is the not-so-secret ingredient behind the legendary fries of Europe's best bistros. Render or buy good duck fat, get it properly hot, and you are already most of the way to the finest fry you have made at home.

The Double Fry & Spiced Ketchup

The technique still matters. Soak and dry the cut potatoes, then fry them twice: a first gentle fry in the duck fat to cook them through, then a rest, then a second hot fry to crisp and color them into a deep golden crunch. Drain them on a rack and salt them immediately. Serve them with a homemade spiced ketchup whose warm spice and tang cut the duck fat's richness. The result is a fry with a fluffy center, a crackling shell, and a savory depth that is unmistakable.

Jorj Morgan

Crispy Duck Fat Fries with Spiced Ketchup

A high-prestige side utilizing starch management and a disciplined double-fry method. Duck fat provides a superior medium, resulting in a shattered, golden-brown crust and a moist, flavorful interior perfectly complemented by a deeply spiced reduction.

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 20 minutes mins

Wait Time (Soaking/Bloom) 30 minutes mins

Total Time 1 hour hr

Servings: 8 servings

Course: Side Dish

Cuisine: American

Ingredients Equipment Method

Ingredients

  

For the Fries

• 2 large Idaho potatoes scrubbed
• Duck fat for frying

For the Spiced Ketchup Base

• 1 6-ounce can tomato paste
• ¼ cup brown sugar
• 2 tablespoons red wine vinegar

For the Ketchup Spices & Seasoning

• ¼ teaspoon ground mustard
• ¼ teaspoon cinnamon
• 1/8 teaspoon ground cloves
• 1/8 teaspoon ground allspice
• ¼ teaspoon coarse salt
• ¼ teaspoon coarse black pepper

Equipment

• 1 Heavy-duty deep-frying pot
• 1 Stainless steel mesh spider strainer
• 1 Professional kitchen thermometer
• 1 Precision french fry cutter
• 1 Large metal baking sheet (lined with parchment)

Method

 

Prep

1. Cut the scrubbed potatoes into uniform planks, then into strips.
2. Submerge the strips in a bowl of cold water for at least 30 minutes to remove excess starch, which ensures a cleaner fry and prevents sticking.

The Ketchup Reduction

1. In a small saucepan over low heat, whisk together the tomato paste, brown sugar, red wine vinegar, mustard, cinnamon, cloves, allspice, and ¼ cup of water.

The Flavor Bloom

1. Simmer the mixture for 10 minutes until the sugar has dissolved and the sauce is smooth.
2. Season with salt and pepper.
For the best result, allow the ketchup to sit at room temperature or refrigerate overnight to let the spices fully bloom.

The First Fry

1. Drain and blot the potato strips completely dry with paper towels.
2. Heat duck fat in a heavy skillet to 325°F using a candy thermometer.
3. Fry the potatoes in batches for 5 minutes until just beginning to turn golden.
4. Transfer to a paper towel-lined baking sheet.

The Finish

1. Increase the oil temperature to 375°F.
2. Return the pre-cooked potatoes to the hot fat and fry for an additional 5 minutes until they are deep golden brown, rigid, and perfectly crisp.

Season and Serve

1. Transfer the fries to a clean baking sheet and season immediately with a generous sprinkle of coarse salt.
2. Serve warm alongside the house-made spiced ketchup.