Creamy Crockpot Potato au Gratin Soup for Easy Weeknight Dinners Tips, FAQ & printable recipe

Tips for success

For a deeper flavor, consider sautéing the onions in a little butter until translucent before adding them to the slow cooker, though this is optional.

Adding a pinch of dried thyme or a bay leaf during the cooking process can also introduce a subtle, herbal complexity that complements the sharpness of the cheddar cheese and the earthiness of the potatoes.

If you find that the soup is too thick after cooking, you can thin it out with a small amount of warm milk or additional broth, stirring gently to maintain the consistency. Conversely, if you prefer a thicker soup, you can gently mash a few of the cooked potato slices against the side of the slow cooker to release more starch into the liquid.

Variations

• Bacon and Potato Gratin Soup: Stir in one cup of pre-cooked, crumbled bacon bits during the final thirty minutes of cooking to add a smoky, salty depth to the soup.
• Spicy au Gratin Soup: Add a teaspoon of crushed red pepper flakes along with the paprika for a gentle heat that balances the creaminess of the cheese and potatoes.

Storage and make-ahead

Fridge

Store in an airtight container in the refrigerator for up to 3 days.

Freezer

Freezing is not recommended as the potato texture can become grainy and the creamy broth may separate upon thawing.

Reheat

Reheat gently on the stovetop over low heat, stirring occasionally until warmed through, or use a microwave-safe bowl in short intervals.

Transfer any leftovers to an airtight container once they have cooled to room temperature. It is important to refrigerate the soup within two hours of cooking to ensure food safety.

When stored properly in the refrigerator, the soup will maintain its quality and flavor for up to three days. Be aware that the potatoes may continue to absorb some of the liquid, so you may need to add a splash of water when reheating.

You can prepare the potato and onion layers in the slow cooker insert ahead of time and store them in the refrigerator, covered, for up to four hours before cooking.

When you are ready to begin, simply add the broth and cheese, then start the cooking process. This is a great way to save time on busy days, allowing you to have a warm meal ready exactly when you need it.

Serving ideas

Serve this soup in deep, warm bowls to help maintain its temperature. A garnish of fresh chives or a little extra cracked black pepper can add a pop of color and a fresh bite that cuts through the richness of the cheese. It pairs excellently with a side of crusty bread or a simple green salad to balance the heartiness of the potatoes.

Because this is a dense and filling soup, consider serving smaller portions as a starter or a larger portion as a main course accompanied by something light.

The creamy texture makes it a comforting choice for cold days, and it holds up well if you need to serve guests, as it can be kept warm on the lowest setting of your slow cooker during the meal.

Frequently asked questions

Recipe card

Creamy Crockpot Potato au Gratin Soup for Easy Weeknight Dinners

Prep 10 minCook 4 hTotal 4 h 10 minServes 6

Ingredients

• 3 lbs russet potatoes, peeled and thinly sliced
• 1 large yellow onion, thinly sliced
• 2 cups sharp cheddar cheese, shredded
• 1 tsp paprika
• 4 cups creamy broth

Instructions

1. Arrange the thinly sliced russet potatoes in the slow cooker, overlapping them in even rows to ensure consistent cooking throughout the pot.
2. Scatter the sliced onions and shredded sharp cheddar over the potato layer. Sprinkle the paprika evenly across the top to provide subtle warmth and color.
3. Pour the creamy broth over the layered ingredients in the slow cooker. Cover and cook on low for 4 to 6 hours until the potatoes are tender and the soup is thickened.

Contains: milk

Estimated nutrition per serving

Calories

420

Protein

14.5 g

Carbohydrates

48 g

Fat

19 g

Fiber

4.5 g

Sugar

3.5 g

Sodium

650 mg

Automatic estimate from the ingredient list, not laboratory-verified.