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Au Gratin Potatoes

emaninthekitchen

Published: 10 Dec 2025 › Updated: 10 Dec 2025

Au Gratin Potatoes

https://www.instagram.com/p/DRfgOnwiZhq

Ingredients

🥔 6-7 large yellow potatoes or russet potatoes
🧈 3 tablespoons unsalted butter
🧅 1 medium onion diced
🧄 5 cloves garlic minced
🌿 1 teaspoon fresh thyme chopped
🌿 1 teaspoon fresh rosemary chopped
🥛 2 cups heavy cream
🥛 1 cup whole milk
🧀 1 block Boursin garlic and fine herbs cheese Brand: Boursin
🧂 1 teaspoon salt
🌶️ 1/2 teaspoon black pepper
🧀 1.5 cups shredded white cheddar cheese
🧀 1.5 cups shredded Colby Jack cheese
🧴 Cooking spray
🌿 Chives or parsley


Instructions

1- Preheat Oven:

  • Preheat your oven to 375°F (190°C).

2- Prepare Potatoes:

  • Peel and thinly slice the yellow or russet potatoes into uniform rounds, approximately 1/8 to 1/4 inch thick.

3- Prep Baking Dish:

  • Lightly spray an oval baking dish with cooking spray.

4- Arrange Potatoes:

  • Layer the sliced potatoes in the baking dish in an overlapping pattern.

5- Make Sauce:

  • In a non-stick skillet over medium heat, melt the butter.
  • Add the diced onion and sauté until softened, about 5-7 minutes.
  • Stir in the minced garlic, chopped thyme, and rosemary, sautéing for another minute until fragrant.
  • Pour in the heavy cream and whole milk.
  • Add the Boursin cheese block, stirring continuously until melted and incorporated into a smooth sauce.
  • Season with salt and black pepper, mixing well.
  • Stir in 1 cup of white cheddar and 1 cup of Colby Jack cheese until melted into a thick sauce.

6- Assemble Dish:

  • Pour the hot cheese sauce evenly over the layered potatoes.

7- Top with Cheese:

  • Sprinkle the remaining 1/2 cup white cheddar and 1/2 cup Colby Jack cheese over the top.

8- Bake:

  • Cover the baking dish with aluminum foil.
  • Bake for 45-60 minutes, or until the potatoes are tender.
  • Remove the foil and bake for an additional 15-20 minutes until the top is golden brown and bubbling.

9- Rest and Serve:

  • Allow the dish to rest for a few minutes before serving. Garnish with chives or parsley if desired.

Prep Time: 20-30 minutes
Cook Time: 60-80 minutes
Total Time: 80-110 minutes
Servings: Serves approximately 6-8
Calories: 350-400
Protein: 10g
Fats: 25g
Carbohydrates: 25g
Equipment: Standard vegetable peeler, Chef’s knife, Cutting board, Oval ceramic or stoneware baking dish, Non-stick skillet, Wooden spoon, Measuring cups/jug, Salt & pepper grinder, Oven and oven mitt, Serving utensils


Cooking Tips

  • No Roux Needed: This recipe achieves creaminess with Boursin cheese, eliminating the need for a flour-based roux.
  • Slice Thinly: Thin and uniform potato slices ensure even cooking.
  • Layer Artfully: Creates an elegant presentation and ensures even sauce distribution.

#comfortfood #potatoes #cheese #gourmet #thanksgivingsidedish


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