Description

The creamiest scalloped potatoes made with Yukon Gold potatoes, garlic-onion cream sauce, and baked to golden perfection. An easy and foolproof recipe that’s perfect for any occasion.

Ingredients

¼ cup salted butter

1 large yellow onion, diced (about 1 cup)

2 cloves garlic, minced

¼ cup all-purpose flour

2 cups milk (whole or 2%)

1 cup chicken broth (low-sodium preferred)

1¼ tsp kosher salt (divided)

½ tsp black pepper (divided)

3 lbs Yukon Gold or red potatoes, sliced 1/8-inch thick

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Instructions

Preheat the oven to 400°F (200°C). Grease a 9×13-inch casserole dish. Slice the potatoes into 1/8-inch thick slices using a mandoline. Soak in cold water to prevent browning, then drain and pat dry.
In a saucepan, melt the butter over medium heat. Add the diced onion and sauté for 5-7 minutes, then add minced garlic and cook for another minute.
Sprinkle the flour over the onions and garlic, stirring constantly to form a roux. Slowly whisk in the chicken broth, followed by the milk. Stir until the sauce thickens, about 5–8 minutes.
Remove from heat, then stir in 1 tsp salt and ¼ tsp pepper.
Layer one-third of the potatoes in the casserole dish, seasoning with salt and pepper. Pour one-third of the sauce over the potatoes. Repeat two more layers, finishing with the remaining sauce on top.
Cover with foil and bake for 40 minutes. Remove the foil and bake for an additional 20-30 minutes until the top is golden and the potatoes are tender.
Let the casserole rest for 10 minutes before serving.

Notes

For creamy results, make sure the sauce thickens enough to coat the back of a spoon.

Yukon Gold potatoes hold their shape well and provide a creamy texture, but red potatoes can be used as a substitute.

You can assemble the casserole up to 8 hours ahead, refrigerate, and bake later.

For extra flavor, add fresh thyme, rosemary, or shredded Gruyère cheese to the sauce.

Leftovers can be stored in the fridge for up to 3 days, reheated at 350°F for 10-15 minutes.

Prep Time: 20 minutes
Cook Time: 1 hour 10 minutes
Category: Side Dish
Method: Baked
Cuisine: American

Nutrition

Serving Size: 1 serving
Calories: 290
Sugar: 5g
Sodium: 600mg
Fat: 15g
Saturated Fat: 9g
Unsaturated Fat: 6g
Trans Fat: 0g
Carbohydrates: 35g
Fiber: 3g
Protein: 5g
Cholesterol: 30mg