Baked Onions with Asiago Cheese (Creamy & Comforting)

Rich, savory, and melt-in-your-mouth—this dish turns simple onions into an elegant side or vegetarian main.

🛒 Ingredients (Serves 4)

• 4 large onions (sweet or yellow)
• 2 tbsp butter (plus extra for greasing)
• ¾ cup heavy cream
• 1 cup grated Asiago cheese
• ¼ cup grated Parmesan cheese (optional, for extra depth)
• 2 cloves garlic, minced (or 1 tsp garlic powder)
• ½ tsp salt (adjust to taste)
• ¼ tsp black pepper
• ½ tsp dried thyme (or 1 tsp fresh thyme)
• Optional: pinch of paprika or chili flakes

🔪 Prep & Cooking Instructions

1️⃣ Prep the Onions

1. Preheat oven to 190°C / 375°F
2. Lightly butter a baking dish.
3. Peel onions and cut them in half from top to bottom.
4. Place onion halves cut-side down in the dish.

2️⃣ Make the Creamy Cheese Sauce

1. In a small saucepan over medium-low heat, melt 2 tbsp butter.
2. Add garlic and sauté 30 seconds until fragrant (do not brown).
3. Stir in heavy cream, salt, pepper, and thyme.
4. Simmer gently for 2–3 minutes, then remove from heat.
5. Stir in Asiago cheese (and Parmesan if using) until smooth.

3️⃣ Bake

1. Pour sauce evenly over the onions.
2. Cover loosely with foil.
3. Bake for 30 minutes.
4. Remove foil and bake another 20–25 minutes, until onions are tender and top is golden and bubbly.
5. Optional: Broil for 2–3 minutes for extra browning.

4️⃣ Rest & Serve

Let rest 5 minutes before serving. Garnish with fresh thyme or black pepper if desired.

🧀 Flavor Notes

• Onions become sweet, soft, and jammy
• Asiago adds a nutty, savory sharpness
• Cream sauce balances richness with herbal warmth

🥗 Nutrition Information (Approx. Per Serving)

• Calories: ~320 kcal
• Protein: ~9 g
• Fat: ~26 g
• Carbohydrates: ~15 g
• Fiber: ~2 g
• Sugar: ~7 g
• Calcium: ~25% DV

(Values may vary based on cheese and cream brand.)

🌱 Dietary Notes

• Vegetarian
• Gluten-free
• Low-carb friendly
• Not vegan (contains dairy)

🔄 Variations & Add-Ins

• Lighter version: Use half-and-half instead of heavy cream
• Herb swap: Rosemary or sage instead of thyme
• Extra crunch: Sprinkle buttered breadcrumbs before final bake
• Spicy: Add chili flakes or cayenne
• Protein boost: Add crispy bacon bits or sautéed mushrooms

 Q & A

Q: Can I make this ahead of time?
Yes. Assemble up to 24 hours ahead, cover, refrigerate, and bake when needed.

Q: What can I substitute for Asiago?
Gruyère, sharp white cheddar, or Comté work beautifully.

Q: Can I use red onions?
Yes—expect a slightly sweeter, milder flavor.

Q: How do I store leftovers?
Refrigerate in an airtight container for up to 3 days.

Q: Can I freeze it?
Not recommended—cream sauces can separate when thawed.

🍽️ Serving Suggestions

• Roast chicken or grilled steak
• Holiday spreads (Thanksgiving, Eid, Christmas)
• With crusty bread or as a rich vegetarian side

• Author
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Sara Mitchell

Sara Mitchell is an expert restaurant content creator who writes easy-to-read guides about CAVA and other Mediterranean fast-casual chains in the United States. She covers locations, menus, prices, and hours, making it simple for visitors to find nearby restaurants and what to order quickly.

With years of experience in restaurant research and local SEO, Sara creates accurate, user-friendly guides that work for both people and search engines. Her goal is to help users go from search results to their nearest restaurant or menu choice with as few clicks as possible.

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