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Homemade Au Gratin Potatoes

Homemade au gratin potatoes are a great side dish for any meal, but especially for the holidays. You can let the slow cooker do most of the work while you concentrate on other things.

Slow Cooker Au Gratin Potatoes

Homemade au gratin potatoes in a bowl.

Slow cooker au gratin potatoes are a scrumptious recipe with sliced potatoes and a creamy cheesy sauce.

The potatoes au gratin are packed with flavorful ingredients including butter, cheddar cheese, sour cream, minced onion, and garlic salt.

Cheesy au gratin potatoes in a bowl.

What Ingredients Do I Need For The Au Gratin Potatoes Recipe?

  • Potatoes
  • Butter
  • Flour
  • Salt
  • Pepper
  • Garlic salt
  • Milk
  • Shredded cheddar cheese
  • Sour cream
  • Minced onion

Full printable recipe with measurements and instructions listed at the bottom of the post in the recipe card.

How To Make Cheesy Au Gratin Potatoes

Sliced potatoes in a slow cooker with salt and pepper.

Slice the potatoes and layer them in the slow cooker. Sprinkle with some salt and pepper between the layers.

Melting butter and onions with flour in a saucepan.

Grab a medium to large saucepan and add some butter and melt on medium heat. Once the butter melts, add the flour and mix it in with a whisk.

Pouring milk into saucepan with flour, onions, and butter to make au gratin sauce.

Pour the milk into the pan while whisking. Try to keep whisking until all of the lumps are gone.

Au gratin sauce cooking in a saucepan.

Next, add the garlic salt and minced onion to the bowl and mix well. Cook until the sauce is thick.

The sauce will thicken fast–it doesn’t take long, so don’t go fold any laundry (like I always try to do) or anything like that.

Au gratin potato sauce with sour cream.

Once the sauce thickens add the sour cream and shredded cheddar cheese to the bowl and combine.

Au gratin potatoes cooking in a slow cooker.

Pour the sauce over the potatoes.

I take a spoon and move the potatoes around a little to get the sauce down between layers.

Cooked au gratin potatoes in a slow cooker.

Replace the lid and cook the potatoes for three to four hours on high.

Once you start to see the edges brown and the potatoes are soft, the side dish is done.

Slow cooker cheesy au gratin potatoes in a slow cooker.

Main Dishes That Are Perfect With Homemade Au Gratin Potatoes

Scalloped Potatoes vs Au Gratin

What’s the difference between scalloped potatoes and au gratin? There are not really a lot of differences between the two.

Au gratin potatoes are usually cooked with cheese and scalloped are cooked in cream without the cheese.

Cheesy au gratin potatoes in a bowl.

Side Dishes That Go Along Great with Au Gratin Potatoes

Slow cooker au gratin potatoes

Check out the slow cooker au gratin recipe card below, grab those ingredients, and start cooking! This is a great meal for the family.

Then, share your comments below and share a picture of your side dish on the Pinterest Pin!  If you made any changes or added something different, be sure to share it with us so we can try it, too!

Yield: 10

Homemade Au Gratin Potatoes

Cheesy au gratin potatoes in a bowl.

Homemade au gratin potatoes are a great side dish for any meal, but especially for the holidays. You can let the slow cooker do most of the work while you concentrate on other things. 

Prep Time 20 minutes
Cook Time 4 hours
Total Time 4 hours 20 minutes

Ingredients

  • 5-6 cups sliced potatoes
  • 2 tsp. salt
  • 1 tsp. pepper
  • 4 Tbsp. butter
  • 6 Tbsp. flour
  • 4 cups milk
  • 1-1/2 tsp. garlic salt
  • 1-1/2 Tbsp. minced onion
  • 1 cup sour cream
  • 3 cups shredded cheddar cheese

Instructions

  1. Slice the potatoes about 1/4-inch thick and layer into a greased slow cooker, sprinkling salt, and pepper in between.
  2. In a medium to large saucepan, melt the butter on medium heat.
  3. After the butter melts, add the flour and whisk.
  4. Pour the milk into the saucepan and whisk until the lumps are gone.
  5. Add the garlic salt and minced onion and mix. Cook the sauce until it thickens.
  6. Once the sauce thickens, add the sour cream and shredded cheddar cheese and stir until melted.
  7. Pour the sauce over the potatoes. Take a spoon and move the potatoes around a little to allow the sauce to flow down in between the potatoes.
  8. Replace the lid and cook on high for three to four hours or until the potatoes are soft.

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Nutrition Information:

Yield:

10

Serving Size:

1

Amount Per Serving: Calories: 756Total Fat: 23gSaturated Fat: 13gTrans Fat: 1gUnsaturated Fat: 7gCholesterol: 67mgSodium: 1148mgCarbohydrates: 117gFiber: 11gSugar: 7gProtein: 25g

Nutrition is approximate.

Did you make this recipe?

Please leave a comment on the blog or share a photo on Pinterest

Find more delicious recipes at Julia’s Simply SouthernSouth Your Mouth, and Southern Home Express.

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