Gratin di Patate alla Fontina (Italian Potato Gratin)

Gratin di Patate alla Fontina (Italian Potato Gratin)

Story of the Dish

This Alpine style potato gratin combines thinly sliced potatoes with Fontina, Parmigiano Reggiano, cream, milk, garlic and nutmeg. It is designed around contrast, tender defined layers underneath and a deeply browned cheese crust above.

Fontina, traditionally associated with Valle d’Aosta, melts exceptionally well and brings nuttiness, creaminess and savory depth. The objective is not a loose casserole swimming in cream, but a gratin that holds cleanly when portioned while remaining moist and tender inside.

Recipe Information

• Prep Time: 25 minutes

• Cook Time: 1 hour 10 minutes

• Resting Time: 15 minutes

• Total Time: 1 hour 50 minutes

• Servings: 6 to 8

• Oven: 375°F (190°C)

Ingredients

• 3 lb Yukon Gold potatoes (1.36 kg)

• 1 1/2 cups heavy cream (355 ml)

• 1 cup whole milk (240 ml)

• 8 oz Fontina cheese (225 g), grated

• 3/4 cup finely grated Parmigiano Reggiano (75 g)

• 2 tbsp unsalted butter (28 g)

• 2 garlic cloves

• 1 1/2 tsp fine sea salt (8 g)

• 1/2 tsp freshly ground white or black pepper

• 1/8 tsp freshly grated nutmeg

• 1 tsp fresh thyme leaves, optional

Preparation

1. Preheat the oven to 375°F (190°C), butter a 9 × 13 inch (23 × 33 cm) baking dish and rub the interior with a cut garlic clove.

2. Combine cream, milk, the remaining garlic, salt, pepper and nutmeg in a saucepan. Bring slowly to a gentle simmer, remove from the heat and infuse for 10 minutes. Remove the garlic.

3. Peel the potatoes and slice them uniformly about 1/8 inch (3 mm) thick using a mandoline. Do not rinse them.

4. Arrange the first potato layer in overlapping slices. Spoon over a small amount of warm cream mixture and add a light layer of Fontina.

5. Repeat the layers, pressing gently as you build the gratin. Reserve some Fontina for the top.

6. Pour over the remaining cream mixture. The potatoes should be well moistened but not submerged.

7. Cover tightly with foil and bake for 40 minutes.

8. Remove the foil, test the center, then add the remaining Fontina and Parmigiano Reggiano.

9. Bake uncovered for another 25 to 30 minutes, until completely tender and deeply golden. Broil briefly only if additional color is needed.

10. Rest for at least 15 minutes before cutting so the layers stabilize.

Professional Technique

Uniform slicing is essential. At about 1/8 inch (3 mm), the potatoes cook through without losing their layered identity.

Do not rinse the potato slices. Their natural surface starch thickens the dairy and helps bind the gratin. Covering during the first cooking phase cooks the center evenly, while uncovering later allows moisture to evaporate and the cheese to caramelize.

Chef Tips

• Use Yukon Gold potatoes for a creamy center and reliable structure.

• Grate Fontina while cold so it distributes evenly.

• Season the dairy before assembling the gratin.

• Keep the cheese layers restrained so the dish does not become greasy.

• For clean restaurant portions, cool the gratin under light pressure, portion cold and reheat individual pieces.

Common Mistakes

• Uneven slicing leaves some layers firm and others overcooked.

• Rinsing removes starch needed for cohesion.

• Too much liquid creates a soupy gratin.

• Too much Fontina can separate and release fat.

• Cutting immediately after baking destroys the structure.

Wine Pairing

Valle d’Aosta Petite Arvine — Its mineral acidity cuts through cream and melted Fontina.

Valle d’Aosta Prié Blanc — Fresh and delicate, it keeps the rich gratin from feeling heavy.

Valle d’Aosta Malvoisie — A broader aromatic choice for poultry, pork or mushroom dishes.

Barbera d’Asti DOCG — A bright red option with veal and roasted pork.

Valle d’Aosta Donnas DOC — A more structured pairing when the gratin is served with beef or braised meat.

Storage & Reheating

Refrigerate the cooled gratin in an airtight container for up to 3 days.

Reheat at 350°F (175°C), covered at first and uncovered for the final minutes so the top becomes crisp again. Individual portions can be reheated at 375°F (190°C).

Nutrition per Serving

• Calories: 445

• Protein: 15 g

• Carbohydrates: 39 g

• Fat: 26 g

• Saturated Fat: 16 g

• Fiber: 4 g

• Sugars: 4 g

• Sodium: 650 mg

• Cholesterol: 85 mg

Final Note

The success of this gratin depends on thickness, moisture and temperature control. Fontina should become part of the structure rather than a heavy topping, while the finished portion should cut cleanly and remain creamy at the center.

Chef Gianluca