Pearl Onion Mushroom Bake

Creamy, comforting, and packed with earthy flavors, this Pearl Onion Mushroom Bake is the ultimate side dish or vegetarian centerpiece for any meal. Featuring tender, caramelized pearl onions and golden button mushrooms nestled in a velvety béchamel sauce, this recipe delivers layers of texture and rich, savory depth. A crispy topping of Parmesan cheese and bread crumbs adds the perfect crunch, while a hint of nutmeg and fresh thyme infuse warmth and freshness into every bite. Ready in just an hour, this bake is an elegant and easy-to-make dish ideal for holiday gatherings, potlucks, or as a cozy weeknight comfort food. Serve it alongside roasted meats or a fresh salad to complete the meal.

Nutriscore Rating: 64/100

Prep Time:25 mins

Cook Time:35 mins

Total Time:60 mins

Servings: 6

Ingredients

• 500 g pearl onions
• 300 g button mushrooms
• 3 tbsp butter
• 2 tbsp all-purpose flour
• 2 cups whole milk
• 0.5 cup heavy cream
• 0.5 cup grated Parmesan cheese
• 0.5 cup bread crumbs
• 2 garlic cloves, minced
• 1 tbsp olive oil
• 0.25 tsp ground nutmeg
• 1 tsp fresh thyme leaves
• 1 tsp salt
• 0.5 tsp black pepper

Directions

Step 1

Preheat the oven to 375°F (190°C). Grease a baking dish with a thin layer of butter or oil.

Step 2

Bring a pot of water to a boil. Add the pearl onions and blanch for 2-3 minutes. Drain and rinse under cold water. Peel the onions and set aside.

Step 3

In a large skillet, heat 1 tablespoon of olive oil over medium heat. Add the minced garlic and sauté for 1 minute until fragrant.

Step 4

Add the button mushrooms to the skillet and cook for 5-6 minutes until they release their liquid and become golden brown. Remove from heat and set aside.

Step 5

In a medium saucepan, melt 3 tablespoons of butter over medium heat. Whisk in the flour and cook for 1-2 minutes to form a roux.

Step 6

Gradually pour in the milk, whisking continuously to avoid lumps. Cook for 3-4 minutes until the sauce thickens.

Step 7

Stir in the heavy cream, nutmeg, thyme, salt, and black pepper. Mix well.

Step 8

Add the sautéed mushrooms and peeled pearl onions to the sauce, folding gently to coat evenly.

Step 9

Pour the mixture into the prepared baking dish. Sprinkle the top with Parmesan cheese and bread crumbs for a crispy, golden crust.

Step 10

Bake in the preheated oven for 25-30 minutes, or until the top is bubbly and lightly browned.

Step 11

Let the Pearl Onion Mushroom Bake cool for 5 minutes before serving. Garnish with additional thyme leaves, if desired.

Nutrition Facts

Serving size	(1587.2g)

Amount per serving	% Daily Value*
Calories	1803.4

Total Fat 120.8g	0%
Saturated Fat 63.3g	0%
Polyunsaturated Fat 2.9g
Cholesterol 317.3mg	0%
Sodium 3926.5mg	0%
Total Carbohydrate 123.7g	0%
Dietary Fiber 15.0g	0%
Total Sugars 51.8g
Protein 58.0g	0%

Vitamin D 221.4IU	0%
Calcium 1365.1mg	0%
Iron 6.5mg	0%
Potassium 2594.3mg	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: 59.9%

Protein: 12.8%

Carbs: 27.3%