The Creamiest Roasted Parmesan Onions Recipe You’ll Ever Try

Roasted parmesan creamed onions redefine ordinary side dishes into culinary masterpieces that spark immediate dinner table excitement.

These elegant vegetables carry deep, rich flavors that seamlessly blend comfort and sophistication.

Creamy textures intermingle with crisp roasted edges, creating a sensory experience beyond traditional vegetable preparations.

Sweet onions mellow under high heat, developing complex caramelized undertones that complement the salty parmesan cheese.

Sophisticated yet approachable, this recipe elevates simple ingredients into something extraordinary.

Home cooks can easily master this technique with minimal preparation and maximum deliciousness.

The result promises a memorable accompaniment that will have everyone requesting seconds.

What Makes Roasted Parmesan Creamed Onions So Flavorful

• Elevate Ordinary Onions: Transform humble onions into a luxurious side dish that surprises and delights with its rich, creamy texture and golden-brown crispiness.
• Craft Gourmet Flavors Easily: Achieve restaurant-quality results with minimal cooking skills, using simple ingredients and straightforward techniques that create a sophisticated taste profile.
• Quick Comfort Meets Elegance: Prepare a decadent side dish in under 45 minutes that combines the warmth of home cooking with the sophistication of Parmesan and cream, perfect for impressing dinner guests or enjoying a special weeknight meal.

Roasted Parmesan Creamed Onions Ingredient List

Main Ingredients:

Onions: Sweet and mild onions work best, with a delicate flavor and tender texture when roasted.

Parmesan Cheese: Sharp and salty cheese that adds a rich, nutty flavor and golden brown topping.

Heavy Whipping Cream: Provides a luxurious, creamy base that helps bind and enrich the dish.

Liquid and Seasoning Ingredients:

Olive Oil: Helps roast onions evenly and adds a subtle fruity undertone.

White Cooking Wine: Introduces depth and complexity to the cream sauce.

Salt and Pepper: Classic seasonings that enhance the natural flavors of the onions.

Garlic Powder: Adds a subtle, aromatic warmth without overwhelming the dish.

Cayenne Pepper: Provides a gentle heat and subtle spiciness to the cream sauce.

Additional Ingredients:

Butter: Adds richness and helps create a smooth, velvety cream sauce.

Aluminum Foil: Helps trap moisture and prevent excessive browning during initial baking.

Parchment Paper: Ensures easy cleanup and prevents onions from sticking to the baking sheet.

How to Make Roasted Parmesan Creamed Onions

Step 1: Prepare Oven and Baking Surface

Crank up the oven to 375°F (190°C) and line a baking sheet with parchment paper for easy cleanup.

Step 2: Slice and Arrange Onions

Thinly slice onions and spread them evenly across the prepared baking sheet.

Step 3: Season Onion Layer

• Salt
• Black pepper

Step 4: Initial Roasting

Slide the baking sheet into the oven and roast onions for 15 minutes.

Step 5: Create Creamy Sauce

• White cooking wine
• Butter
• Garlic powder
• Heavy whipping cream
• Cayenne pepper

Simmer until the mixture thickens and becomes smooth.

Step 6: Adjust Oven Temperature

Remove onions from oven and increase temperature to 450°F (230°C).

Step 7: Add Cream and Cheese

Pour the creamy sauce over roasted onions and generously sprinkle grated Parmesan cheese.

Step 8: Final Baking

Cover baking sheet with aluminum foil and bake for 20 minutes. Then uncover and continue baking for 10 more minutes until the top turns golden and sauce bubbles.

Expert Tips for Roasted Parmesan Creamed Onions

• Select Sweet Onions: Choose Vidalia or Walla Walla varieties for a milder, sweeter flavor that caramelizes beautifully.
• Slice Uniformly: Use a mandoline or sharp knife to create thin, consistent onion slices for even roasting and a professional presentation.
• Control Cream Consistency: Stir the cream mixture constantly to prevent scorching and achieve a smooth, velvety texture without burning.
• Enhance Cheese Flavor: Use freshly grated Parmesan for maximum flavor and avoid pre-packaged shredded cheese, which can contain anti-caking agents.
• Crisp the Top: Remove the foil during the final baking stage to create a golden, slightly crispy surface that adds delightful textural contrast.

Storing and Reheating Roasted Parmesan Creamed Onions

• Store Leftovers
• Refrigerate creamed onions in an airtight container within 2 hours of cooking. Properly sealed, the dish will stay fresh for 3-4 days in the refrigerator. Cover the container tightly to prevent odors from spreading and maintain optimal flavor.
• Reheat Method 1 – Oven: Preheat oven to 350°F. Transfer onions to an oven-safe dish, add a splash of cream to prevent drying. Cover with foil and warm for 10-15 minutes until heated through.
• Reheat Method 2 – Stovetop: Place onions in a skillet over medium-low heat. Stir gently and add a little cream to restore moisture. Warm for 5-7 minutes, stirring occasionally to prevent burning.

What to Serve with Roasted Parmesan Creamed Onions

• Pair with Crisp White Wine: Select a chardonnay or sauvignon blanc to complement the creamy, rich flavors of the roasted Parmesan onions. The wine's acidity will cut through the heavy cream and balance the dish's richness.
• Serve alongside Roasted Protein: Match these onions with roasted chicken or grilled pork tenderloin. The caramelized onions and creamy sauce create a perfect harmony with tender, juicy meats.
• Create a Mediterranean Salad Companion: Prepare a light arugula salad with lemon vinaigrette to contrast the onions' decadent texture. Fresh herbs like basil or parsley will add a bright, zesty note that enhances the dish's deep flavors.
• Complement with Crusty Bread: Offer a rustic baguette or sourdough to soak up the delicious Parmesan cream sauce. The bread's crispy exterior and soft interior will provide a delightful textural counterpoint to the tender, roasted onions.

Fun Twists on Roasted Parmesan Creamed Onions

• Caramelized Herb Onion Gratin: Swap cayenne for fresh thyme and rosemary, adding depth with chopped fresh herbs mixed into the cream sauce for an aromatic Mediterranean-style side dish.
• Smoky Bacon Parmesan Onions: Crisp pancetta or bacon pieces between onion layers, incorporating smoky flavor and extra richness to the creamy base.
• Spicy Mexican-Style Onion Bake: Replace white wine with Mexican beer, add ground cumin and chili powder, top with pepper jack cheese for a zesty southwestern kick.
• Vegan Creamy Roasted Onions: Use coconut cream instead of heavy cream, nutritional yeast in place of Parmesan, and olive oil to maintain the luxurious texture while keeping the dish plant-based.

Roasted Parmesan Creamed Onions Recipe

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4.8 from 28 reviews

• Total Time: 1 hour
• Yield: 4 1x

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Description

Roasted Parmesan Creamed Onions elevate humble alliums into a luxurious side dish that sings with rich, golden complexity. Caramelized edges and a silky cream sauce create a memorable companion for elegant dinners or hearty comfort meals.

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Ingredients

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Main Ingredients:

• 3 Sweet onions, thinly sliced
• 1 cup (240 milliliters) Heavy whipping cream
• ½ cup (50 grams) Parmesan cheese, grated

Fats and Oils:

• 4 tablespoons (56 grams) Butter
• 3 tablespoons (45 milliliters) Olive oil

Seasonings and Liquids:

• ¼ cup (60 milliliters) White cooking wine
• 1 teaspoon Garlic powder
• ¼ teaspoon Cayenne pepper
• Salt and pepper to taste

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Instructions

1. Preheat the oven to 375 degrees Fahrenheit (190 degrees Celsius) and prepare a baking sheet with parchment paper for optimal non-stick cooking.
2. Arrange thin, translucent onion slices evenly across the prepared baking sheet, ensuring minimal overlap.
3. Generously drizzle extra virgin olive oil over the onion layers, then season with kosher salt and freshly ground black pepper to enhance natural flavors.
4. Roast the onions in the preheated oven for 15 minutes until they begin to soften and develop subtle caramelization.
5. Meanwhile, craft the luxurious cream sauce by combining white cooking wine, unsalted butter, garlic powder, heavy whipping cream, and a pinch of cayenne pepper in a medium saucepan.
6. Simmer the cream mixture over medium heat, stirring continuously until it thickens and develops a velvety consistency, approximately 5-7 minutes.
7. Remove the partially roasted onions from the oven and increase the temperature to 450 degrees Fahrenheit (230 degrees Celsius) for final browning.
8. Carefully pour the enriched cream sauce over the roasted onions, ensuring even distribution.
9. Generously sprinkle freshly grated Parmesan cheese across the surface for a rich, nutty flavor profile.
10. Cover the baking sheet with aluminum foil and return to the oven for 20 minutes to allow flavors to meld.
11. Uncover and continue baking for an additional 10 minutes until the top turns golden brown and the edges become crispy and bubbly.

Notes

• Achieve perfectly caramelized onions by slicing them thinly and evenly for consistent roasting.
• Create a rich, velvety sauce by simmering cream mixture until it thickens, enhancing the overall flavor profile.
• Elevate the dish’s taste with a strategic two-stage baking process: first roasting, then creaming and browning.
• Use high-quality Parmesan cheese for a nutty, robust finish that complements the sweet roasted onions.
• Control heat levels carefully to prevent burning while ensuring golden, bubbly texture on top.
• Select fresh, firm onions for the best taste and texture in this luxurious side dish.

• Prep Time: 15 minutes
• Cook Time: 45 minutes
• Category: Dinner, Appetizer
• Method: Baking
• Cuisine: American

Nutrition

• Serving Size: 4
• Calories: 385 kcal
• Sugar: 6 g
• Sodium: 320 mg
• Fat: 36 g
• Saturated Fat: 22 g
• Unsaturated Fat: 12 g
• Trans Fat: 0.5 g
• Carbohydrates: 9 g
• Fiber: 2 g
• Protein: 7 g
• Cholesterol: 115 mg