Asiago Creamy Baked Onions are a delicious and comforting dish that brings rich flavors to your table. These tender onions, baked to perfection, are coated in a creamy sauce with a hint of Asiago cheese, making them a perfect side dish or a unique appetizer. Whether you’re serving a family dinner or hosting a gathering, this recipe is sure to impress.

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Why Make This Recipe
Making Asiago Creamy Baked Onions is a fantastic way to elevate ordinary onions into something special. They are simple to prepare, require just a few ingredients, and can easily be made ahead of time. The combination of the sweet, roasted onions and the rich, creamy sauce creates a dish that is both satisfying and flavorful. Plus, it’s a great way to introduce more vegetables to your meals!
How to Make Asiago Creamy Baked Onions
Ingredients:
- 4 large yellow onions
- Olive oil
- 1/2 teaspoon fresh thyme
- Salt
- Pepper
- 1 cup heavy cream
- 2 teaspoons Dijon mustard
- 1/2 cup Asiago cheese
Directions:
- Preheat your oven to 450°F (230°C).
- Grease a baking dish and arrange the onion slices in a single, even layer.
- Drizzle the onions with olive oil and sprinkle with thyme, salt, and pepper.
- Roast the onions for 20 minutes, or until they are soft and starting to caramelize.
- While the onions roast, heat the heavy cream in a saucepan over medium heat until it begins to simmer.
- Stir in the Dijon mustard and half of the Asiago cheese until it is melted and combined.
- Pour the creamy mixture over the roasted onions.
- Top with the remaining Asiago cheese.
- Cover the dish with foil and bake for an additional 20 minutes, or until the onions are tender, the cheese is melted, and the sauce is bubbling.
How to Serve Asiago Creamy Baked Onions
Asiago Creamy Baked Onions are best served warm as a side dish. They pair wonderfully with grilled meats, roasted chicken, or even as part of a vegetarian meal. You can also serve them as a delicious appetizer with crusty bread for dipping.
How to Store Asiago Creamy Baked Onions
To store leftovers, let the dish cool completely. Then, transfer it to an airtight container and refrigerate. The baked onions can be stored for up to 3 days. To reheat, simply warm them in the oven until heated through.
Tips to Make Asiago Creamy Baked Onions
- Use fresh thyme for the best flavor. You can also experiment with other herbs like rosemary or oregano.
- Don’t rush the roasting process; caramelizing the onions adds depth to the dish.
- If you want an extra cheesy flavor, consider adding more Asiago cheese on top before baking.
Variation
You can switch up the cheese by using Gruyère or Parmesan instead of Asiago for a different flavor profile. Additionally, you might add some sautéed mushrooms or spinach to the cream mixture for added taste and texture.
FAQs
1. Can I use other types of onions?
Yes, you can use sweet onions, red onions, or even shallots for different flavors and colors.
2. Can I make this recipe ahead of time?
Absolutely! You can prepare the dish in advance, cover it, and store it in the fridge. Just bake it right before serving.
3. Is it possible to freeze Asiago Creamy Baked Onions?
Yes, you can freeze them. Just ensure they cool completely, then store in a freezer-safe container. Reheat in the oven when you’re ready to enjoy them.

Asiago Creamy Baked Onions
Ingredients
Main Ingredients
- 4 large large yellow onions
- 1 tablespoon olive oil
- ½ teaspoon fresh thyme
- to taste salt
- to taste pepper
- 1 cup heavy cream
- 2 teaspoons Dijon mustard
- ½ cup Asiago cheese divided
Instructions
Preparation
- Preheat your oven to 450°F (230°C).
- Grease a baking dish and arrange the onion slices in a single, even layer.
- Drizzle the onions with olive oil and sprinkle with thyme, salt, and pepper.
Roasting
- Roast the onions for 20 minutes, or until they are soft and starting to caramelize.
Making the Cream Sauce
- While the onions roast, heat the heavy cream in a saucepan over medium heat until it begins to simmer.
- Stir in the Dijon mustard and half of the Asiago cheese until it is melted and combined.
Baking
- Pour the creamy mixture over the roasted onions.
- Top with the remaining Asiago cheese.
- Cover the dish with foil and bake for an additional 20 minutes, or until the onions are tender, the cheese is melted, and the sauce is bubbling.