Cauliflower casserole with cheese sauce and mushrooms is a comforting dish that's both creamy and satisfying. You'll start by sautéing mushrooms and boiling tender cauliflower. Then, you'll whip up a lower-fat cheese sauce to bring it all together. Topped with crispy breadcrumbs, it's a light yet flavorful option perfect for weeknight meals. Plus, you can easily customize it with proteins or extra vegetables to suit your taste. Discover even more about this delightful dish ahead.
History

Cauliflower casserole has a rich history that dates back to the early 20th century, evolving into a beloved comfort food during the Great Depression when families sought economical meal options.
As cauliflower gained popularity in the 19th century, especially in Europe, it found its way into American kitchens, often baked with various ingredients.
The use of cheese sauce in casseroles became common in the mid-1900s, providing a creamy texture at a low cost, typically with processed cheese products.
Adding mushrooms, like common white and cremini, enhanced flavor and umami, making the dish even more appealing.
Over the years, you've seen countless variations that cater to different tastes and dietary preferences, ensuring this comfort food remains a staple on many tables.
Recipe

Cauliflower casserole with cheese sauce and mushrooms is a delightful and comforting dish that brings together the earthy flavors of sautéed mushrooms and the subtle crunch of tender cauliflower florets, all enveloped in a luscious cheese sauce.
This vegetarian casserole is perfect for family dinners, gatherings, or as a satisfying side dish. Not only is it rich in flavor, but it also offers a healthier alternative by using lower fat cheese and avoiding heavy creams.
To prepare this casserole, you'll need to start by selecting a fresh head of cauliflower and some quality mushrooms. The key to achieving the perfect texture is to boil the cauliflower just until it's crisp-tender, allowing it to maintain some bite even after baking.
The sautéed mushrooms will add a savory depth, while the creamy cheese sauce binds everything together, creating a harmony of flavors that's sure to please everyone at the table.
Sautéed mushrooms bring savory depth, while creamy cheese sauce unites the dish in a delightful harmony of flavors.
Ingredients:
- 1 head of cauliflower
- 18 oz sliced mushrooms
- 2 cups milk
- 1/4 cup flour
- 2 cups shredded lower fat cheese (e.g., cheddar)
- Salt and pepper to taste
- Olive oil for sautéing
Cooking Instructions:
Begin by preheating your oven to 350°F. Bring a large pot of salted water to a boil, then add the cauliflower florets and cook for about 5 minutes until crisp-tender. Drain and set aside.
In a skillet, heat a drizzle of olive oil over medium heat and sauté the sliced mushrooms until softened, about 5-7 minutes. In a separate saucepan, combine the milk and flour, whisking until smooth, and cook over medium heat until thickened.
Stir in the shredded cheese until melted and smooth. In a large mixing bowl, combine the cauliflower, sautéed mushrooms, and cheese sauce, mixing until everything is well coated. Transfer the mixture to a baking dish and bake for 25 minutes until bubbly and golden.
Extra Tips:
For added flavor, consider incorporating herbs such as thyme or parsley into the cheese sauce or sprinkling some breadcrumbs on top before baking for a crunchy topping.
If you want to make the dish even heartier, feel free to add cooked quinoa or brown rice. Leftovers can be stored in the fridge for up to three days and reheated in the oven or microwave, making this casserole a convenient option for meal prep.
Cooking Steps

To get started on your cauliflower casserole, preheat your oven to 375°F and sauté the mushrooms until they're golden.
Next, mix in your cheese sauce generously and sprinkle breadcrumbs evenly on top.
Finally, bake it until it's golden brown and bubbling for a delicious finish.
Step 1. Preheat Oven to 375°F

Before diving into assembling your cauliflower casserole, make sure to preheat your oven to 375°F. This step is crucial, as it ensures your casserole cooks evenly and develops that bubbly, lightly browned top we all love.
Allow the oven to preheat for about 15-20 minutes before placing the casserole inside. A properly preheated oven helps the cheese melts perfectly, preventing the dish from becoming too watery.
To confirm your oven reaches the desired temperature, consider using an oven thermometer. Once it's heated, place the casserole in the center of the oven for optimal heat circulation.
This way, you'll achieve that delicious, golden crust and a satisfying texture in every bite. Happy cooking!
Step 2. Sauté Mushrooms Until Golden

Now that your oven's preheated and ready to go, it's time to sauté the mushrooms.
Start by heating 1 tablespoon of olive oil or butter in a frying pan over medium heat. Add the sliced mushrooms in a single layer, making sure not to overcrowd the pan; this promotes browning instead of steaming.
Sauté the mushrooms for about 5-7 minutes, stirring occasionally until they turn golden brown and release their moisture. For extra flavor, season them with a pinch of salt and pepper while cooking to enhance their natural umami taste.
Once they're golden and tender, remove the sautéed mushrooms from the heat and drain any excess liquid. This method of sautéing mirrors the importance of color accuracy in achieving the best culinary presentation.
These delicious morsels will complement your cauliflower casserole and sharp cheddar cheese perfectly!
Step 3. Add Cheese Sauce Generously

As you prepare to add the cheese sauce, melt 3 tablespoons of butter in a saucepan over medium heat.
Stir in 3 tablespoons of flour, cooking for one minute to create a smooth roux.
Gradually whisk in 1½ cups of milk, cooking and stirring until the mixture thickens and reaches a boiling point, usually about 5-7 minutes.
Now, incorporate 1½ to 2 cups of shredded medium sharp cheddar cheese, stirring until it melts completely and the sauce is smooth.
In a large bowl, combine the sautéed mushrooms and cooked cauliflower with this creamy cheese sauce, ensuring everything's generously coated for maximum flavor.
Pour the cheesy mixture into a prepared casserole dish, ready for the next step!
Step 4. Sprinkle With Breadcrumbs Evenly

To achieve a perfectly crispy topping, sprinkle the breadcrumbs evenly over the surface of your cauliflower casserole. Use about 1/2 to 1 cup of breadcrumbs, adjusting based on how crunchy you want it.
Make sure to distribute the breadcrumbs to cover every corner of the dish for consistent browning. For an extra flavor boost, mix some grated parmesan cheese into the breadcrumbs before applying them. This will add a delicious depth to your topping.
After you've spread the breadcrumbs, lightly spray or drizzle them with olive oil. This step enhances their golden color and crispiness, ensuring you get that delightful contrast with the creamy cheese sauce beneath. You might also consider adding colorful sprinkles for a fun twist on presentation.
Now you're ready for the next step!
Step 5. Bake Until Golden Brown

The aroma of a bubbling cauliflower casserole fills the kitchen as you prepare to bake it.
First, preheat your oven to 375°F to ensure even cooking and browning.
Once you've combined the sautéed mushrooms and cauliflower with the creamy cheese sauce, transfer the mixture to a prepared casserole dish.
Sprinkle grated parmesan cheese generously on top to achieve that golden, bubbly crust.
Now, it's time to bake until golden brown! Place the dish in the oven and let it bake for 20 to 30 minutes.
Keep an eye on it, watching for a lightly browned surface and bubbling cheese to signal it's done.
After baking, allow the casserole to cool for a few minutes before serving.
Enjoy!
Final Thoughts

While you're looking for a delicious and healthy dish, the cauliflower casserole stands out as a delightful option.
This Cheesy Mushroom casserole combines the creamy richness of lower-fat cheese sauce with the earthy flavor of mushrooms, creating a satisfying meal or side.
It's quick to prepare, taking only about 30 minutes on medium heat, making it perfect for busy weeknights.
With approximately 189 calories per serving, it offers a lighter alternative to traditional casseroles without sacrificing flavor.
Plus, the dish's versatility lets you add proteins like chicken or various vegetables, tailoring it to your taste.
Frequently Asked Questions
Can I Use Frozen Cauliflower for This Casserole?
Absolutely, you can use frozen cauliflower for your casserole!
Just make sure to thaw it first and drain any excess water to avoid a soggy dish. It's a convenient option that saves time and still gives you that great taste.
You might want to cook it briefly before adding it to your casserole to enhance its flavor.
What Cheese Works Best for the Sauce?
Imagine a creamy sunset melting over your dish.
When it comes to cheese for your sauce, you can't go wrong with a blend of sharp cheddar and creamy mozzarella. The cheddar brings a bold flavor, while the mozzarella adds a luscious texture that pulls everything together.
If you want a hint of sophistication, sprinkle in some Parmesan for that nutty finish. Your sauce will become a rich tapestry of flavors that'll delight every bite!
How Can I Make This Dish Gluten-Free?
To make this dish gluten-free, you'll want to substitute any wheat-based ingredients with gluten-free alternatives.
Use gluten-free breadcrumbs or crushed nuts for topping, and ensure your cheese sauce is made with gluten-free flour or cornstarch.
Always check labels on packaged ingredients to avoid hidden gluten.
Can I Add Protein to the Casserole?
Did you know that adding protein to your meals can help you feel fuller longer? Absolutely, you can add protein to your casserole!
Consider incorporating cooked chicken, turkey, or even beans for a hearty boost. Tofu or tempeh are great plant-based options, too.
Just make sure to adjust cooking times accordingly so everything blends well. By doing this, you'll enhance the dish's nutritional value while keeping it delicious and satisfying!
Is This Casserole Suitable for Meal Prep?
Absolutely, this casserole's perfect for meal prep!
You can easily make a large batch ahead of time, portion it out, and store it in the fridge or freezer.
Just reheat when you're ready to eat, and you'll have a delicious, hassle-free meal at hand.
It holds up well in storage, so you won't have to worry about it losing flavor or texture.
Enjoy the convenience of having meals ready to go!