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Slow Cooker Potato Gratin

This Slow Cooker Potato Gratin is a rich, cheesy, and comforting side dish that’s perfect for any occasion. Made with tender Yukon gold potatoes, creamy cheese sauce, and flavorful seasonings, this dish cooks effortlessly in the slow cooker, freeing up oven space for holiday meals or family dinners.

  • Total Time: 3 hours 30 minutes

Ingredients

Scale

  • 2 pounds Yukon gold potatoes – Thinly sliced for a tender texture.
  • 1 1/2 cups milk – Creates a creamy base.
  • 1/2 cup sour cream chive dip – Adds tanginess and depth of flavor.
  • 3 tablespoons butter – Enhances richness.
  • 3 tablespoons all-purpose flour – Thickens the cheese sauce.
  • 3/4 teaspoon salt, divided – Balances flavors.
  • 1 1/2 cups shredded Cheddar cheese – Melts beautifully for a gooey texture.
  • 1/4 cup freshly grated Parmesan cheese – Adds a savory, nutty flavor.
  • 1/2 teaspoon garlic powder – Enhances flavor.
  • 1/4 teaspoon freshly ground black pepper – For a mild kick.
  • 1/2 cup chopped onion, divided – Provides a subtle sweetness.
  • Chopped fresh chives – For garnish and freshness.

Instructions

  1. Prepare the Slow Cooker: Line a 6-quart slow cooker with a liner or coat with nonstick spray.
  2. Make the Sauce:

    • Whisk milk and sour cream dip in a bowl.
    • Melt butter in a saucepan over medium heat, whisk in flour and 1/2 teaspoon salt, and cook for 1 minute.
    • Stir in milk mixture and bring to a boil, whisking constantly. Reduce heat and simmer for 1 minute.
    • Remove from heat and stir in Cheddar cheese until melted.

  3. Mix Parmesan Seasoning: In a bowl, mix Parmesan cheese, garlic powder, remaining 1/4 teaspoon salt, and black pepper.
  4. Layer the Ingredients:

    • Place half of the potato slices in the slow cooker.
    • Sprinkle with half of the Parmesan mixture and half of the chopped onion.
    • Pour half of the cheese sauce over the layers.
    • Repeat the layers with remaining potatoes, Parmesan mixture, onions, and cheese sauce.

  5. Cook:

    • Cover the slow cooker with paper towels under the lid to absorb excess moisture.
    • Cook on High for 3 to 4 hours, replacing paper towels once halfway through.

  6. Garnish & Serve: Once the potatoes are tender, sprinkle with fresh chives and serve warm.
  • Author: Paula
  • Prep Time: 30 minutes
  • Cook Time: 3 hours
  • Category: Side Dish
  • Cuisine: American, French-inspired

Nutrition

  • Serving Size: 8
  • Calories: 286 per serving