Asiago Creamy Baked Onions

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Here’s a recipe for Asiago Creamy Baked Onions — a rich, cheesy, and comforting side dish that turns humble onions into something truly indulgent.

Asiago Creamy Baked Onions

Servings: 6
Prep Time: 15 minutes
Cook Time: 45 minutes

Ingredients

  • 4 large sweet onions (Vidalia or Walla Walla are ideal)

  • 3 tbsp butter

  • 2 tbsp all-purpose flour

  • 1 ½ cups heavy cream (or half-and-half for lighter version)

  • ½ tsp salt (adjust to taste)

  • ¼ tsp black pepper

  • ¼ tsp ground nutmeg (optional but adds warmth)

  • 1 cup grated Asiago cheese (divided, about ¾ cup for sauce, ¼ cup for topping)

  • ¼ cup grated Parmesan cheese

  • 2 tbsp fresh parsley, chopped (optional garnish)

Instructions

  1. Prep the Onions

    • Preheat oven to 375°F (190°C).

    • Peel onions and slice them into ½-inch thick rings.

    • Place onion slices in boiling water for 5 minutes to soften slightly, then drain well.

  2. Make the Creamy Asiago Sauce

    • In a medium saucepan, melt butter over medium heat.

    • Stir in flour and cook for 1 minute to make a roux.

    • Gradually whisk in the heavy cream until smooth.

    • Add salt, pepper, and nutmeg.

    • Stir in ¾ cup Asiago cheese until melted and creamy.

  3. Assemble the Dish

    • Arrange onion slices in a buttered baking dish.

    • Pour the Asiago cream sauce evenly over the onions.

    • Sprinkle with remaining ¼ cup Asiago cheese and Parmesan.

  4. Bake

    • Bake uncovered for 30–35 minutes until bubbly and golden on top.

  5. Serve

    • Garnish with parsley if desired.

    • Serve hot as a side to roasted meats, chicken, or holiday meals.

💡 Tips & Variations:

  • For a deeper flavor, add 2 cloves of roasted garlic to the sauce.

  • Swap half the Asiago with Gruyère for a nuttier, meltier texture.

  • If you want extra crunch, sprinkle a handful of buttery breadcrumbs over the top before baking.

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