Recipes Side Dish Potato Potatoes Au Gratin Recipes Slow Cooker Potato Gratin 4.4 (5) 5 Reviews 1 Photo Use your slow cooker to make this cheesy potato gratin and free up your oven at your next gathering. By Sarah Brekke Sarah Brekke Sarah Brekke is a culinary professional with over 10 years of experience food media. With a background in both culinary and food sciences, she uses her skills to develop, test, and modify recipes to make them as tasty and practical as possible. Allrecipes' editorial guidelines Published on March 13, 2025 Tested by Emily Nienhaus Tested by Emily Nienhaus Emily is a recipe developer at Dotdash Meredith with a focus on food trends, and inventing new ways to bring interesting flavors to your dinner table. When not in the kitchen Emily enjoys hiking, camping and spending time with friends, although these hobbies always lead back to food being the focus. Meet the Allrecipes Test Kitchen Save Rate Print Share Close Add Photo Prep Time: 30 mins Cook Time: 3 hrs Total Time: 3 hrs 30 mins Servings: 8 Jump to Nutrition Facts Cook Mode (Keep screen awake) Ingredients 1x 2x 4x Oops! Something went wrong. Our team is working on it. Original recipe (1X) yields 8 servings 2 pounds Yukon gold potatoes (peeled if desired), sliced 1/8-inch thick 1 1/2 cups milk 1/2 cup sour cream chive dip 3 tablespoons butter, cut into 3 pieces 3 tablespoons all-purpose flour 3/4 teaspoon salt, divided 1 1/2 cups shredded Cheddar cheese 1/4 cup freshly grated Parmesan cheese 1/2 teaspoon garlic powder 1/4 teaspoon freshly ground black pepper 1/2 cup chopped onion, divided chopped fresh chives for garnish Directions Gather all ingredients. Line a 6-quart slow cooker with a disposable liner or generously coat with nonstick cooking spray. Jake Sternquist / Food Styling: Lauren McAnelly / Prop Styling: Sue Mitchell Whisk together milk and sour cream dip in a bowl. Jake Sternquist / Food Styling: Lauren McAnelly / Prop Styling: Sue Mitchell Melt butter in a small saucepan over medium heat. Whisk in flour and 1/2 teaspoon salt. Cook, stirring constantly, for 1 minute. Stir in milk mixture and bring to a boil, whisking constantly, over medium-high heat. Reduce heat to medium and simmer, whisking constantly, about 1 minute. Jake Sternquist / Food Styling: Lauren McAnelly / Prop Styling: Sue Mitchell Remove pan from heat and stir in Cheddar cheese until melted, about 15 seconds. Jake Sternquist / Food Styling: Lauren McAnelly / Prop Styling: Sue Mitchell In a small bowl mix together Parmesan cheese, garlic powder, remaining 1/4 teaspoon salt, and pepper. Jake Sternquist / Food Styling: Lauren McAnelly / Prop Styling: Sue Mitchell Layer half of the potatoes in the bottom of the prepared slow cooker. Sprinkle with half of the Parmesan mixture. Top with onion and half of the cheese sauce. Layer remaining potato slices in the slow cooker and sprinkle with remaining Parmesan mixture. Pour remaining cheese sauce over the potatoes. Jake Sternquist / Food Styling: Lauren McAnelly / Prop Styling: Sue Mitchell Cover opening of slow cooker completely with paper towels. Jake Sternquist / Food Styling: Lauren McAnelly / Prop Styling: Sue Mitchell Cover with the lid and cook on High until potatoes are tender, 3 to 4 hours, replacing the paper towels once halfway through cooking. Serve topped with chives. Jake Sternquist / Food Styling: Lauren McAnelly / Prop Styling: Sue Mitchell I Made It Print 61 home cooks made it! Nutrition Facts (per serving) 286 Calories 14g Fat 31g Carbs 11g Protein Show Full Nutrition Label Hide Full Nutrition Label Nutrition Facts Servings Per Recipe 8 Calories 286 % Daily Value * Total Fat 14g 18% Saturated Fat 8g 40% Cholesterol 39mg 13% Sodium 472mg 21% Total Carbohydrate 31g 11% Dietary Fiber 3g 10% Total Sugars 4g Protein 11g 21% Vitamin C 12mg 13% Calcium 256mg 20% Iron 1mg 8% Potassium 726mg 15% * Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs. ** Nutrient information is not available for all ingredients. Amount is based on available nutrient data. (-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.