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A spoonful of Crock Pot Potato Au Gratin over a crock pot
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4.95 from 206 votes

Crock Pot Potato Au Gratin

 Crock Pot Au Gratin Potatoes ~ Delicious, Easy, Au Grain Potatoes Using the Slow Cooker! The Crock Pot Makes this Cheesy, Creamy, and Comforting Dish So Easy! Perfect for a Holiday Side Dish or for Every Day Meals!
Prep Time15 minutes
Cook Time3 hours
Total Time3 hours 15 minutes
Course: Side Dish
Cuisine: American
Servings: 6 -8
Calories: 423kcal
Author: Julie Evink

Ingredients

  • 3 pounds russet or Yukon Gold potatoes
  • 1 small onion chopped
  • 4 tablespoons butter
  • 1/4 cup all purpose flour
  • 2 cups whole milk
  • 2 teaspoons garlic powder
  • salt and pepper to taste
  • 1 cup shredded Monterey Jack cheese
  • 1 cup shredded sharp cheddar cheese

Instructions

  • Wash OR peel your potatoes.  Slice to 1/8" thick, set aside.  (I like to leave the peel on my potatoes)
  • Generously coat slow cooker with non-stick spray.  
  • In a medium saucepan melt the butter over medium-low heat.  Add flour and whisk to combine.  Whisk in the milk, garlic powder, pepper, and a generous amount of salt.  (I use at least a teaspoon.)  Cook stirring frequently just until it starts to thicken.  Remove from heat and stir in cheeses. 
  • Place 1/3 of the sliced potatoes in the bottom of the slow cooker.  Sprinkle with 1/3 of the chopped onion.  Pour 1/3 of the cheese sauce over the potatoes and onions.  Repeat this 2 more times.  Cover and cook on high for 3-4 hours or low for 4-6 hours or until potatoes are tender.  Let sit 20 minutes before serving. 

Notes

Do not keep this on the warm setting.  
The sauce will thicken as it cools. 

Nutrition

Serving: 1 | Calories: 423kcal | Carbohydrates: 38g | Protein: 18g | Fat: 22g | Saturated Fat: 13g | Cholesterol: 64mg | Sodium: 343mg | Potassium: 1116mg | Fiber: 6g | Sugar: 5g | Vitamin A: 700IU | Vitamin C: 27.2mg | Calcium: 443mg | Iron: 8mg