If you are searching for a side dish that truly dazzles with both simplicity and rich flavor, then this Roasted Parmesan Creamed Onions Recipe is your new best friend in the kitchen. It combines tender, caramelized onions with a velvety Parmesan cream sauce that wraps every bite in cozy, savory goodness. Each mouthful bursts with a balance of sweetness from the roasted onions and the cheesy, herb-infused creaminess that makes it perfect for elevating any meal, whether you’re hosting a holiday feast or simply craving something comfortingly elegant.
Ingredients You’ll Need
These ingredients are straightforward but each one plays a key role in building the delicious layers of flavor, texture, and color in this dish. From the tender onions to the rich Parmesan, every item here is essential for achieving the perfect balance.
- 2 pounds small yellow or white onions (peeled and halved): The star of the show, these onions roast beautifully to develop sweetness and depth.
- 2 tablespoons olive oil: Helps the onions roast evenly and get that gorgeous caramelization.
- Salt and black pepper to taste: Essential for seasoning and bringing out all the natural flavors.
- 2 tablespoons unsalted butter: Adds richness and helps create the creamy sauce base.
- 2 tablespoons all-purpose flour: Thickens the cream into a luscious sauce without lumps.
- 1½ cups heavy cream or half-and-half: Creates the smooth, indulgent texture of the cream sauce.
- ½ teaspoon garlic powder: Gives a gentle hint of garlicky warmth without overpowering the onions.
- ½ teaspoon thyme (dried or fresh): Adds an earthy, aromatic note that pairs perfectly with cheese and onions.
- ½ cup grated Parmesan cheese (plus more for topping): Brings a nutty, savory flavor that melts into the cream to make it irresistible.
- Chopped fresh parsley for garnish (optional): Adds a pop of color and fresh brightness to finish the dish beautifully.
How to Make Roasted Parmesan Creamed Onions Recipe
Step 1: Roast the Onions to Perfection
Start by preheating your oven to 400°F (200°C). Toss the peeled, halved onions in olive oil, salt, and black pepper so each piece is nicely coated. Arrange them cut side up in a greased or parchment-lined baking dish. Roast them for 25 to 30 minutes until they become tender and start to caramelize around the edges. This roasting step is where those sweet, deep flavors develop that will shine through the final dish.
Step 2: Prepare the Creamy Parmesan Sauce
While the onions roast, melt the unsalted butter in a saucepan over medium heat. Stir in the flour and cook for about one minute to get rid of the raw flour taste. Slowly whisk in the heavy cream or half-and-half, garlic powder, thyme, and a pinch of salt and black pepper. Simmer the mixture for 4 to 5 minutes, stirring often, until it thickens into a smooth, velvety sauce. Then stir in the grated Parmesan until it melts completely, enriching the sauce with that unmistakable cheesy flavor.
Step 3: Combine and Bake
Pour this decadent Parmesan cream sauce over the roasted onions, making sure each piece is generously coated. Sprinkle some extra grated Parmesan on top for a golden, bubbly finish once baked again. Return the baking dish to the oven and bake for another 15 to 20 minutes until the sauce is bubbly and the top is beautifully golden. Let it cool slightly for a few minutes before serving to let the flavors settle and the sauce thicken just a bit.
How to Serve Roasted Parmesan Creamed Onions Recipe
Garnishes
A simple sprinkle of fresh chopped parsley adds more than just a splash of green – it adds a fresh, herbaceous lift that cuts through the richness of the Parmesan cream sauce for perfect balance and an inviting presentation.
Side Dishes
This dish pairs beautifully with roast meats like chicken, pork, or beef, as well as holiday favorites such as turkey or ham. Its creamy, cheesy texture complements hearty mains and makes every meal feel festive and special.
Creative Ways to Present
Try serving the roasted Parmesan creamed onions in individual ramekins for an elegant single-serve side at dinner parties. Alternatively, layer the onions and cheese sauce over toasted rustic bread for a show-stopping appetizer everyone will ask for again.
Make Ahead and Storage
Storing Leftovers
After the meal, you can store any leftover Roasted Parmesan Creamed Onions Recipe in an airtight container in the refrigerator for up to 3 days. When chilled, the sauce may thicken quite a bit, but it will reheat beautifully with just a little extra cream or milk to loosen it.
Freezing
Because of the dairy content, freezing is not recommended as it may cause the sauce to separate and become grainy upon thawing. For best results, enjoy this dish fresh, or refrigerate and consume within a few days.
Reheating
Reheat the leftovers gently in a saucepan over low heat, stirring frequently. Add a splash of cream or milk if needed to restore the sauce’s silky consistency. Avoid high heat to prevent curdling and maintain that luscious, creamy texture.
FAQs
Can I use different types of onions for this recipe?
Absolutely! While small yellow or white onions work best for their natural sweetness and texture, you can experiment with pearl onions or sweet Vidalia onions if you prefer a milder, sweeter flavor.
Is it possible to make this dish dairy-free?
Yes, you can substitute heavy cream with coconut cream or a plant-based cream, and use a dairy-free Parmesan alternative to keep the creamy texture and cheesy flavor while accommodating dietary restrictions.
Can I add other herbs or spices?
Definitely! Fresh rosemary or sage can be lovely additions, and a pinch of nutmeg can enhance the cream sauce’s depth. Just be mindful to balance flavors so the Parmesan and onions remain the stars.
How can I make the sauce thicker or thinner?
If the sauce is too thin, simmer it a bit longer to reduce and thicken. To thin it out, simply whisk in a little more cream, milk, or broth until you reach your desired consistency.
What’s the best way to reheat without losing flavor?
Reheat gently over low heat on the stove rather than the microwave to prevent the sauce from separating. Stir often and add a bit of cream if the sauce thickens too much during reheating.
Final Thoughts
The Roasted Parmesan Creamed Onions Recipe is one of those comforting, crowd-pleasing dishes that surprises everyone with its elegant flavors and effortless appeal. Once you try it, this recipe is sure to become a cherished favorite for special dinners and cozy family meals alike. Go ahead, bring this creamy, savory delight to your table and watch it disappear fast!
Print
Roasted Parmesan Creamed Onions Recipe
- Prep Time: 15 minutes
- Cook Time: 50 minutes
- Total Time: 1 hour 5 minutes
- Yield: 6 servings
- Category: Side Dish
- Method: Roasting
- Cuisine: American
- Diet: Vegetarian
Description
This Roasted Parmesan Creamed Onions recipe features tender, caramelized onions smothered in a rich and creamy Parmesan sauce. Perfect as a comforting side dish, these baked onions combine the sweetness of roasted onions with the savory flavors of garlic, thyme, and melted cheese, creating a deliciously indulgent addition to any meal or holiday feast.
Ingredients
Onions
- 2 pounds small yellow or white onions, peeled and halved
- 2 tablespoons olive oil
- Salt and black pepper to taste
Cream Sauce
- 2 tablespoons unsalted butter
- 2 tablespoons all-purpose flour
- 1½ cups heavy cream or half-and-half
- ½ teaspoon garlic powder
- ½ teaspoon thyme (dried or fresh)
- Salt and black pepper to taste
- ½ cup grated Parmesan cheese, plus more for topping
Garnish
- Chopped fresh parsley (optional)
Instructions
- Preheat and Prepare Onions: Preheat your oven to 400°F (200°C). Toss the peeled and halved onions with olive oil, salt, and black pepper. Arrange them cut side up in a greased or parchment-lined baking dish.
- Roast Onions: Roast the onions in the oven for 25 to 30 minutes, until they are tender and beginning to caramelize, which enhances their natural sweetness and flavor.
- Make Cream Sauce: While the onions roast, melt butter in a saucepan over medium heat. Stir in the flour and cook for about 1 minute to form a roux. Slowly whisk in the heavy cream, garlic powder, thyme, and a pinch of salt and pepper. Simmer the sauce for 4 to 5 minutes, stirring frequently until it thickens.
- Add Parmesan: Stir in the grated Parmesan cheese into the sauce until it melts completely and the mixture is smooth and creamy.
- Combine and Bake: Pour the creamy Parmesan sauce evenly over the roasted onions. Sprinkle additional Parmesan cheese on top. Return the dish to the oven and bake for another 15 to 20 minutes until the sauce is bubbly and golden on top.
- Serve: Allow the dish to cool slightly before serving. Garnish with chopped fresh parsley if desired for a fresh, herby touch.
Notes
- For added depth of flavor, consider adding a splash of white wine or chicken broth to the cream sauce.
- This dish pairs wonderfully with roast meats such as turkey or beef, making it ideal for holiday meals.
- Ensure onions are evenly halved to roast uniformly.
- Use fresh Parmesan cheese for best melting and flavor results.
