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Skillet Scalloped Potato Gratin

A decadent side dish that combines the richness of scalloped potatoes and the cheesiness of au gratin in one.
Prep Time20 mins
Cook Time1 hr 15 mins
Resting Time10 mins
Total Time1 hr 45 mins
Course: Side Dish
Cuisine: American
Keyword: Scalloped Potato Gratin
Servings: 8
Calories: 460kcal
Author: Ned Adams

Equipment

  • 12-inch cast iron skillet

Ingredients

  • 1 tbsp butter softened
  • 4 lbs russet potatoes thinly sliced

Sauce

  • 2 cups heavy cream
  • 3 tbsp onion grated/finely minced
  • 3 tsp garlic grated/finely minced (~6 cloves, 1½tsp granulated)
  • 1 tbsp fresh thyme de-stemmed, more for garnish
  • ½ tbsp salt +/- to taste
  • 2 tsp black pepper divided; +/- to taste
  • ¼ tsp ground nutmeg

Assembly

  • 4 oz white cheddar grated (2 cups)

Instructions

  • Preheat oven to 350°F.
  • Coat the inside of the skillet with softened butter. 

Potatoes

  • Fill a large bowl with cold water; salt generously.
  • Thinly slice the potatoes and placed in salted water.

Sauce

  • In a medium, heavy-bottomed saucepan, whisk the cream, garlic, onion, thyme, salt, 1½ tsp black pepper, and nutmeg together.
  • Bring to a low boil over medium heat.
  • Reduce heat to low and allow to simmer and thicken, about 15 minutes.

Assembly

  • Drain and rinse the potatoes; shake off excess water and return to bowl.
  • Pour the sauce over the potatoes; mix well.
  • Layer the potatoes in the skillet, row by row, until all the potatoes are used.
  • Pour the remaining cream sauce over the potatoes, spread evenly.
  • Sprinkle the cheese over the top, then the remaining pepper, and garnish with a few fresh thyme leaves.
  • Cover and bake for one hour.
  • After an hour, remove lid and bake for an additional 15 minutes.
  • Once done, remove from the oven and allow to rest for 5-10 minutes.
  • Serve and enjoy.

Notes

We used an enameled skillet, but a regular one will work just fine too. 

Nutrition

Calories: 460kcal | Carbohydrates: 44g | Protein: 10g | Fat: 28g | Saturated Fat: 18g | Trans Fat: 1g | Cholesterol: 100mg | Sodium: 571mg | Potassium: 1027mg | Fiber: 3g | Sugar: 2g | Vitamin A: 1107IU | Vitamin C: 15mg | Calcium: 180mg | Iron: 2mg