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Ingredients
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Fries
Truffle & Seasoning
Finishing & Garnish
Method
Fries
Prepare potatoes
Wash and peel potatoes if desired (peels can be left on for texture). Cut each potato into 1/3–1/2-inch thick sticks, aiming for even size for uniform cooking. Rinse cut fries under cold water until water runs clear to remove excess starch.
Dry and parboil (optional but recommended)
Place the rinsed fries in a pot of cold salted water. Bring to a simmer and cook 4–6 minutes until just starting to soften but not falling apart. Drain and spread on a clean kitchen towel or baking sheet to dry thoroughly. Alternatively, you can skip parboil and proceed to a single roast/fry method, but parboil improves interior texture.
Blanch or roast steps
For frying: Heat 2–3 cups neutral oil in a heavy pot to 320°F (160°C). Fry fries in batches 3–4 minutes until pale and just tender. Remove and drain on paper towels. Increase oil temp to 375°F (190°C) and fry again 2–3 minutes until golden and crisp. For oven method: Preheat oven to 425°F (220°C). Toss dried fries with 1 cup vegetable oil and 1 tbs coarse kosher salt on a rimmed baking sheet in a single layer. Roast 25–35 minutes, flipping halfway, until crisp and golden.
Season initial
Immediately after final cook (fry or roast), transfer fries to a large mixing bowl. Season with remaining coarse kosher salt and freshly ground black pepper while hot so salt adheres.
Truffle & Seasoning
Infuse butter
While fries are finishing, melt unsalted butter in a small skillet over low heat. Add finely chopped rosemary and grated garlic and warm gently 1–2 minutes until fragrant but not browned. Remove from heat and stir in extra-virgin olive oil and truffle oil. Taste and adjust—truffle oil is strong, so start with 1 tsp and add up to 1/2 tsp more if desired.
Combine
Pour the warm truffle-rosemary butter mixture over the hot fries in the large bowl. Toss gently but thoroughly so fries are evenly coated. The residual heat will help the flavors adhere.
Finishing & Garnish
Cheese and finish
Sprinkle freshly grated Parmesan over the tossed fries while still warm so it lightly melts and sticks. Toss once gently to distribute cheese.