Potato & onion gratin

Indulge in our delicious Potato & Onion Gratin recipe! Featuring layers of tender potatoes and savory onions, combined with creamy light sour cream, low-fat milk, and a hint of cheddar cheese. This comforting dish is perfect for any meal and simple to prepare.

  • 11 Apr 2025
  • Cook time 65 min
  • Prep time 40 min
  • 6 Servings
  • 5 Ingredients

Potato & onion gratin

Potato & onion gratin is a classic, comforting side dish that's easy to make and perfect for any occasion. This dish combines creamy, cheesy layers of thinly sliced potatoes and onions, all baked to golden perfection. Whether you're serving it at a family dinner or a holiday feast, this recipe is sure to be a crowd-pleaser.

Ingredients:

1 cup light sour cream
230g
1/2 cup milk (1% fat)
120g
1 onion
110g
5 potatoes
1000g
1/2 cup cheddar cheese
50g

Instructions:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Vegetables:
- Peel the potatoes and slice them into thin, even rounds (about 1/8 inch thick).
- Peel the onion and slice it thinly as well.
3. Mix the Cream Sauce:
- In a mixing bowl, combine the light sour cream and 1% milk. Stir well until the mixture is smooth and thoroughly combined.
4. Assemble the Gratin:
- Lightly grease a baking dish (approximately 9x13 inches) with butter or non-stick spray.
- Arrange half of the potato slices evenly in the bottom of the baking dish.
- Spread half of the sliced onions over the potatoes.
- Pour half of the sour cream and milk mixture over the layered potatoes and onions.
- Repeat with the remaining potatoes and onions, creating another layer.
- Pour the remaining cream mixture over the top.
5. Bake:
- Cover the baking dish with aluminum foil and place it in the preheated oven.
- Bake for about 45 minutes.
6. Add Cheese & Continue Baking:
- After 45 minutes, remove the foil and sprinkle the grated cheddar cheese evenly over the top of the gratin.
- Return the dish to the oven and bake, uncovered, for an additional 15-20 minutes or until the potatoes are tender, and the cheese is melted and golden brown.
7. Cool & Serve:
- Remove the gratin from the oven and let it cool for about 5 minutes before serving.
- Garnish with fresh herbs like chives or parsley if desired.
8. Enjoy: Serve the Potato & Onion Gratin as a delicious side dish to your favorite meal.

Tips:

- Use a mandoline to evenly slice the potatoes and onion for a uniform cook.

- Opt for starchy potatoes like Russet or Yukon Gold for the best texture.

- Season each layer with salt and pepper to ensure the best flavor.

- Allow the gratin to cool for a few minutes before serving to let it set.

Potato & onion gratin is a versatile and delicious dish that can elevate any meal. With its rich flavors and creamy texture, it’s a wonderful addition to your recipe repertoire. Follow these simple steps and tips to create a savory, crowd-pleasing side dish that everyone will love.

Nutrition Facts
Serving Size250 grams
Energy
Calories 230kcal12%
Protein
Protein 8g5%
Carbohydrates
Carbohydrates 36g10%
Fiber 3.85g10%
Sugar 3.54g4%
Fat
Fat 7g9%
Saturated 4.29g14%
Cholesterol 22mg-
Vitamins
Vitamin A 70ug8%
Choline 33mg6%
Vitamin B1 0.17mg14%
Vitamin B2 0.17mg13%
Vitamin B3 1.84mg12%
Vitamin B6 0.54mg32%
Vitamin B9 36ug9%
Vitamin B12 0.37ug15%
Vitamin C 36mg39%
Vitamin E 0.20mg1%
Vitamin K 3.82ug3%
Minerals
Calcium, Ca 160mg12%
Copper, Cu 0.20mg22%
Iron, Fe 1.44mg13%
Magnesium, Mg 50mg12%
Phosphorus, P 190mg15%
Potassium, K 860mg25%
Selenium, Se 4.63ug8%
Sodium, Na 100mg7%
Zinc, Zn 1.12mg10%
Water
Water 200g-
* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

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