Asiago Creamy Baked Onions Recipe

Easy Asiago Creamy Baked Onions Recipe: Golden Comfort Bliss

Creamy baked asiago onions bring unexpected magic to any dinner table.

Warm ovens unlock rich, tangy flavors that comfort and surprise.

Cheese lovers understand how simple ingredients can create spectacular results.

Mediterranean culinary traditions inspire this delightful side dish that feels both rustic and elegant.

Caramelized onions develop deep, complex notes when bathed in smooth asiago sauce.

Each bite promises a delectable journey through smooth textures and robust tastes.

Asiago Creamy Baked Onions: A Savory Delight

  • Elevate Vegetable Side Dishes: Transform ordinary onions into a luxurious, restaurant-worthy side that will impress dinner guests and family members with its rich, creamy texture and sophisticated flavor profile.
  • Quick and Foolproof Technique: Achieve professional-level results with minimal cooking skills, using simple roasting and baking methods that guarantee tender, caramelized onions covered in a decadent Asiago cheese sauce.
  • Versatile Crowd-Pleaser: Perfect for holiday gatherings, weeknight dinners, or sophisticated potlucks, this recipe adapts easily to complement various main courses like roasted meats, chicken, or as part of a vegetarian spread.

Ingredients for Asiago Creamy Baked Onions

For the Base:
  • Yellow Onions: Sweet, layered vegetable that provides the core foundation of this creamy baked dish.
  • Olive Oil: Helps to enhance flavor and promote even caramelization of the onions.
For the Seasoning:
  • Fresh Thyme, Salt, Black Pepper: Classic herbs and spices that add depth and enhance the natural sweetness of the onions.
For the Creamy Sauce:
  • Heavy Cream: Rich dairy ingredient that creates a luxurious and smooth base for the sauce.
  • Dijon Mustard: Tangy condiment that adds a subtle sharp flavor and complexity to the cream sauce.
  • Asiago Cheese: Sharp, nutty Italian cheese that melts beautifully and provides a rich, savory element to the dish.

How to Make Asiago Creamy Baked Onions

Step 1: Crank Up the Oven

Fire up your oven to a toasty 450F (230C). Grab a baking dish and generously grease it.

Slice the onions and spread them out in a single, beautiful layer across the bottom of the dish.

Step 2: Roast and Season the Onions

Drizzle the onion slices with olive oil.

Sprinkle with:
  • Chopped thyme
  • Salt
  • Pepper

Pop the dish into the oven and roast for 20 minutes. Watch for the onions to soften and develop those gorgeous caramelized edges.

Step 3: Whip Up the Creamy Sauce

In a small saucepan, warm the heavy cream over medium heat until it starts to simmer. Stir in:
  • Dijon mustard
  • Half of the grated Asiago cheese

Let the cheese melt completely, creating a luxurious, smooth sauce.

Step 4: Bring It All Together

Pour the dreamy cream sauce evenly over the roasted onions. Sprinkle the remaining Asiago cheese on top.

Cover the dish with foil and slide back into the oven. Bake for another 20 minutes.

Look for these signs of perfection:
  • Tender onions
  • Melted cheese
  • Bubbling sauce around the edges

Serve hot and enjoy your creamy, cheesy onion masterpiece!

Tips for Perfect Asiago Creamy Baked Onions

  • Swap out heavy cream for a lighter version like half-and-half or whole milk to reduce calories while maintaining rich flavor.
  • Select sweet onions like Vidalia for a milder, more caramelized taste that melts in your mouth during roasting.
  • Enhance the dish's depth by adding crispy bacon bits or pancetta before the final cheese layer for extra texture and savory notes.
  • Create a gluten-free version by ensuring your Asiago cheese is pure and using mustard without wheat-based additives.
  • Elevate the presentation by garnishing with fresh thyme leaves or chopped chives right before serving to add a bright, herbal touch.

Variations on Asiago Creamy Baked Onions

  • Vegan Creamy Onion Bake: Replace heavy cream with cashew cream and use nutritional yeast instead of Asiago cheese for a dairy-free version.
  • Mediterranean Herb Onions: Swap thyme with oregano and add crumbled feta cheese on top for a Greek-inspired flavor profile.
  • Low-Carb Cauliflower Alternative: Substitute onion slices with roasted cauliflower florets while keeping the same creamy Asiago sauce for a lighter option.
  • Spicy Jalapeño Onion Gratin: Mix in diced jalapeños and add a sprinkle of smoked paprika to create a zesty, heat-packed variation of the original recipe.

Pairing Suggestions for Asiago Creamy Baked Onions

  • Pair Crisp White Wine: A chilled Pinot Grigio or Sauvignon Blanc cuts through the richness of the creamy Asiago sauce, balancing the caramelized onions' sweetness with its bright, acidic notes.
  • Complement with Crusty Bread: Serve warm, rustic sourdough or French baguette slices alongside the dish to soak up the luxurious cheese sauce and add a delightful textural contrast.
  • Match with Herb-Roasted Chicken: Roast a whole chicken seasoned with thyme and rosemary to echo the herb flavors in the onion dish, creating a harmonious and satisfying main course pairing.

Storage Tips for Asiago Creamy Baked Onions

  • Transfer cooled onions to an airtight container and store in the refrigerator for up to 3-4 days. Seal tightly to prevent moisture and odors from affecting the dish's flavor.
  • Pack the onions in a freezer-safe container or heavy-duty freezer bag, removing as much air as possible. Freeze for up to 1-2 months, ensuring the dish is completely cooled before freezing.
  • Preheat oven to 350F, cover the onions with foil to prevent drying, and warm for 15-20 minutes until heated through. Remove foil during the last 5 minutes to restore cheese's crispy texture.

FAQs

  • Can I use different types of onions?

Yes, you can use any large onion variety like sweet Vidalia, yellow, or white onions. Each type will bring a slightly different flavor, but the recipe works well with most onion varieties.

  • Is there a substitute for Asiago cheese?

If Asiago is unavailable, try Parmesan, Gruyère, or sharp cheddar. These cheeses have similar sharp, nutty profiles that complement the creamy sauce.

  • How do I prevent the onions from burning?

Keep the temperature at 450F and cover the dish with foil during the second baking to prevent excessive browning. Check the onions halfway through cooking to ensure even caramelization.

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Asiago Creamy Baked Onions Recipe

Asiago Creamy Baked Onions Recipe


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4.5 from 38 reviews

  • Total Time: 55 minutes
  • Yield: 4 1x

Description

Savory Asiago Creamy Baked Onions bring elegant comfort to your dinner table, melding rich cheese with caramelized sweetness. Creamy layers of asiago and tender onions promise a luxurious side dish that satisfies deeply and delights completely.


Ingredients

Scale

Main Ingredients:

  • 4 large yellow onions, peeled and sliced into 1/4-inch rounds
  • 1 cup heavy cream
  • 1/2 cup Asiago cheese, grated

Herbs and Seasonings:

  • 1/2 teaspoon fresh thyme, chopped
  • Salt, to taste
  • Black pepper, to taste

Finishing Ingredient:

  • Olive oil, for drizzling
  • 2 teaspoons Dijon mustard

Instructions

  1. Preheat oven to 450F (230C) and prepare a baking dish by lightly greasing its surface.
  2. Arrange onion slices in a uniform, single layer across the bottom of the prepared dish.
  3. Drizzle olive oil over the onion slices and sprinkle chopped thyme, salt, and pepper for seasoning.
  4. Roast onions for 20 minutes until they transform into soft, golden-edged caramelized rounds.
  5. Meanwhile, warm heavy cream in a saucepan over medium heat until it reaches a gentle simmer.
  6. Incorporate Dijon mustard into the cream, stirring consistently to create a smooth base.
  7. Blend half of the grated Asiago cheese into the cream sauce, allowing it to melt completely and create a rich, velvety texture.
  8. Remove roasted onions from the oven and carefully pour the creamy Asiago mixture evenly across the surface.
  9. Sprinkle remaining Asiago cheese over the top to create a golden, melting layer.
  10. Cover the baking dish with aluminum foil and return to the oven for an additional 20 minutes.
  11. Verify doneness by ensuring onions are tender, cheese is fully melted, and sauce bubbles around the edges.

Notes

  • Select sweet onions like Vidalia for a milder, more delicate flavor that caramelizes beautifully and reduces potential sharpness.
  • Slice onions uniformly to ensure even cooking and consistent texture throughout the dish, using a sharp knife for clean, precise cuts.
  • Adjust cream sauce thickness by adding more cheese or reducing cream slightly, creating a personalized consistency that suits individual preferences.
  • Transform this side dish into a vegetarian main course by adding roasted garlic, fresh herbs like rosemary, or incorporating vegetable broth for extra depth.
  • Prep Time: 15 minutes
  • Cook Time: 40 minutes
  • Category: Appetizer, Dinner
  • Method: Baking
  • Cuisine: Italian

Nutrition

  • Serving Size: 4
  • Calories: 311 kcal
  • Sugar: 6 g
  • Sodium: 350 mg
  • Fat: 26 g
  • Saturated Fat: 15 g
  • Unsaturated Fat: 9 g
  • Trans Fat: 0.3 g
  • Carbohydrates: 13 g
  • Fiber: 2 g
  • Protein: 10 g
  • Cholesterol: 85 mg
Ethan Caldwell

Ethan Caldwell

Founder & Culinary Innovator

Expertise

Farm-to-table cooking, Seasonal recipe creation, Culinary storytelling, Food photography and styling​

Education

The Chef’s Academy (Indianapolis, IN)

  • Program: Associate Degree in Culinary Arts
  • Focus: Focused on sustainable cooking practices, regional American cuisine, and recipe development.​

Ethan didn’t just fall in love with food, he grew into it, surrounded by fields, farmers’ markets, and family meals that told a story.
After sharpening his skills at The Chef’s Academy, he took his passion straight into the farm-to-table movement, working side-by-side with local growers and seasonal flavors.
He believes every recipe should feel like a walk through a summer market: colorful, fresh, and full of possibility.
Outside the kitchen, Ethan’s idea of a perfect day is hiking mountain trails, digging into heirloom vegetables, and hosting casual dinners where seconds are always encouraged.

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