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5 from 2 votes

Cast Iron Skillet Potatoes Au Gratin

Potatoes are the perfect side to, well, anything. Top those potatoes with a silky, buttery, creamy sauce, and you have sheer perfection. These cast iron skillet potatoes au gratin are the perfect way to make a decadent, delicious side dish, without tons of effort. Once they come out of the oven, you will have a hard time not digging in with a fork!
Prep Time10 mins
Cook Time45 mins
Total Time55 mins
Course: Side Dishes
Cuisine: American
Servings: 8 Servings
Calories: 482kcal
Author: Sunena Anand


  • 10 large Yukon gold potatoes thinly sliced
  • 3 Shallots thinly sliced
  • 2 cups Heavy whipping cream
  • ¼ cup Melted butter
  • 3 cloves Garlic minced
  • 1 teaspoon Dried thyme
  • 1 teaspoon Onion powder
  • 1 teaspoon Sea salt
  • ½ cup Cheddar cheese grated
  • ½ cup Asiago cheese grated


  • Prepare cream mixture: In the microwave or in a sauce pan, melt your butter. Once melted, add to a mixing bowl with heavy whipping cream, garlic, and seasonings.
  • Layer potatoes: In a cast iron skillet, layer sliced potatoes and shallots.
  • Assemble: Pour the heavy cream mixture over the potatoes and shallots, and top with asiago and cheddar cheese.
  • Bake: Bake covered for 30 minutes at 425°F. Bake uncovered for another 15 minutes. Broil on LO if desired.


Calories: 482kcal | Carbohydrates: 41g | Protein: 10g | Fat: 32g | Saturated Fat: 20g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 9g | Trans Fat: 1g | Cholesterol: 108mg | Sodium: 522mg | Potassium: 993mg | Fiber: 5g | Sugar: 3g | Vitamin A: 1181IU | Vitamin C: 43mg | Calcium: 200mg | Iron: 2mg