Mashed Potato Gratin with Garlic and Onions

Indulge in the creamy decadence of Mashed Potato Gratin with Garlic and Onions, a comforting side dish that elevates classic mashed potatoes to gourmet heights. Velvety mashed russet potatoes are infused with a garlic cream sauce and layered with sweet caramelized onions, while a golden, cheesy breadcrumb topping made with Gruyère and Parmesan adds irresistible texture and flavor. Perfectly seasoned and oven-baked until bubbling and crisp, this gratin is the ultimate crowd-pleaser for holidays or casual dinners alike. Quick to prepare and bursting with rich, savory notes, it’s a luxurious twist on a beloved comfort food that’s guaranteed to impress.

Nutriscore Rating: 64/100

Prep Time:20 mins

Cook Time:50 mins

Total Time:70 mins

Servings: 6

Ingredients

• 4 large Russet potatoes
• 6 tablespoons Unsalted butter
• 1.5 cups Heavy cream
• 4 cloves Garlic
• 1 large Yellow onion
• 1 tablespoon Olive oil
• 1 cup Gruyère cheese
• 0.5 cup Parmesan cheese
• 1.5 teaspoons Salt
• 0.5 teaspoons Black pepper
• 0.5 cup Breadcrumbs
• 2 tablespoons Fresh parsley

Directions

Step 1

Preheat your oven to 375°F (190°C). Grease a medium-sized baking dish with butter or non-stick spray.

Step 2

Peel the potatoes and cut them into 2-inch chunks. Place them in a large pot of salted water and bring to a boil. Cook for 15-20 minutes or until the potatoes are fork-tender. Drain and set aside.

Step 3

While the potatoes cook, thinly slice the onion. Heat 1 tablespoon of olive oil in a skillet over medium heat. Add the sliced onion and cook, stirring often, for 10-12 minutes until caramelized. Set aside.

Step 4

Finely mince the garlic or press it using a garlic press. Heat 2 tablespoons of butter in a small saucepan over low heat. Add the garlic and sauté for 1-2 minutes until fragrant. Stir in the heavy cream and warm the mixture gently. Remove from heat.

Step 5

Mash the cooked potatoes using a potato masher or a ricer. Stir in the garlic cream mixture, remaining butter, 1 teaspoon of salt, and 1/2 teaspoon of black pepper. Mix until smooth and creamy.

Step 6

Spread half of the mashed potatoes into the prepared baking dish. Layer the caramelized onions over the mashed potatoes, then top with the remaining mashed potatoes.

Step 7

In a small bowl, combine the Gruyère cheese, Parmesan cheese, and breadcrumbs. Sprinkle this mixture evenly over the top of the potatoes.

Step 8

Bake in the preheated oven for 25-30 minutes, or until the top is golden and crisp.

Step 9

Remove from the oven and let rest for 5 minutes. Sprinkle with chopped parsley before serving.

Nutrition Facts

Serving size	(1988.4g)

Amount per serving	% Daily Value*
Calories	3522.8

Total Fat 194.1g	0%
Saturated Fat 108.7g	0%
Polyunsaturated Fat 3.6g
Cholesterol 549.7mg	0%
Sodium 5947.9mg	0%
Total Carbohydrate 326.0g	0%
Dietary Fiber 26.1g	0%
Total Sugars 24.7g
Protein 100.4g	0%

Vitamin D 31.7IU	0%
Calcium 2055.2mg	0%
Iron 17.8mg	0%
Potassium 7173.7mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 50.6%

Protein: 11.6%

Carbs: 37.8%