Cheesy Vegetable Casserole Recipe
Introduction
This Cheesy Vegetable Casserole is a comforting and flavorful dish that combines tender vegetables with a rich, cheesy sauce. Perfect as a hearty side or a vegetarian main, it’s easy to prepare and bakes to golden perfection.

Ingredients
- 2 cups broccoli florets
- 2 cups cauliflower florets
- 1 cup sliced carrots
- 1 cup chopped zucchini (optional)
- 1 cup chopped bell peppers (optional)
- 2 tablespoons butter
- 2 tablespoons all-purpose flour
- 2 cups milk
- 2 cups shredded sharp cheddar cheese
- 1/2 cup shredded mozzarella cheese
- 1/4 cup grated Parmesan cheese
- 1/2 teaspoon garlic powder
- 1/4 teaspoon nutmeg
- Salt and pepper to taste
- 1/2 cup breadcrumbs
- 2 tablespoons melted butter (for topping)
Instructions
- Step 1: Preheat the oven to 375°F (190°C) and grease a 9×13-inch baking dish.
- Step 2: Blanch or steam the broccoli, cauliflower, and carrots until just tender. If using frozen vegetables, pat them dry to remove excess moisture.
- Step 3: In a saucepan, melt 2 tablespoons of butter over medium heat. Whisk in the flour to form a smooth roux and cook for about 1 minute.
- Step 4: Gradually add the milk while whisking constantly until the sauce thickens and is smooth.
- Step 5: Remove the saucepan from heat and stir in cheddar, mozzarella, garlic powder, nutmeg, salt, and pepper until the cheese melts and the sauce is creamy.
- Step 6: Layer the vegetables evenly in the prepared baking dish. If using zucchini and bell peppers, add them now.
- Step 7: Pour the cheese sauce over the vegetables and gently fold to coat them thoroughly.
- Step 8: In a small bowl, mix the breadcrumbs with 2 tablespoons of melted butter, then sprinkle evenly over the casserole.
- Step 9: Sprinkle the grated Parmesan cheese on top of the breadcrumbs.
- Step 10: Bake uncovered for 25–30 minutes, or until the casserole is bubbly and the topping is golden brown.
- Step 11: Let the casserole rest for 10 minutes before serving to allow it to set.
Tips & Variations
- For added flavor, try mixing in cooked bacon bits or sautéed mushrooms before baking.
- Use whole milk or a mix of milk and cream for a richer cheese sauce.
- Substitute the breadcrumbs with crushed crackers or panko for a different texture.
- To make it gluten-free, use a gluten-free flour blend and gluten-free breadcrumbs.
Storage
Store any leftover casserole covered in the refrigerator for up to 3 days. To reheat, warm it in the oven at 350°F (175°C) until heated through, about 15-20 minutes. Avoid microwaving to keep the topping crispy.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use frozen vegetables for this casserole?
Yes, frozen vegetables work well. Just make sure to thaw and pat them dry to prevent excess moisture from making the casserole watery.
Can I prepare this casserole in advance?
Absolutely. Assemble the casserole, cover it tightly, and refrigerate for up to 24 hours before baking. You may need to add a few extra minutes to the baking time if refrigerated beforehand.
PrintCheesy Vegetable Casserole Recipe
A comforting and flavorful Cheesy Vegetable Casserole featuring a medley of tender broccoli, cauliflower, carrots, and optional zucchini and bell peppers, all smothered in a creamy cheddar and mozzarella cheese sauce and topped with crispy buttery breadcrumbs and Parmesan cheese. Perfect as a hearty side dish or a main for vegetarian meals.
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Total Time: 50 minutes
- Yield: 6 servings 1x
- Category: Main Dish
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
Vegetables
- 2 cups broccoli florets
- 2 cups cauliflower florets
- 1 cup sliced carrots
- 1 cup chopped zucchini (optional)
- 1 cup chopped bell peppers (optional)
Cheese Sauce
- 2 tablespoons butter
- 2 tablespoons all-purpose flour
- 2 cups milk
- 2 cups shredded sharp cheddar cheese
- 1/2 cup shredded mozzarella cheese
- 1/2 teaspoon garlic powder
- 1/4 teaspoon nutmeg
- Salt and pepper to taste
Topping
- 1/2 cup breadcrumbs
- 2 tablespoons melted butter (for topping)
- 1/4 cup grated Parmesan cheese
Instructions
- Preheat oven: Preheat your oven to 375°F (190°C) and generously grease a 9×13-inch baking dish to prevent sticking.
- Prepare vegetables: Blanch or steam the broccoli, cauliflower, and carrots until they are just tender but still retain a slight crunch. If using frozen vegetables, pat them dry thoroughly to avoid excess moisture.
- Make the roux: In a saucepan, melt 2 tablespoons of butter over medium heat. Whisk in the all-purpose flour to create a smooth roux, cooking for about 1-2 minutes without browning it.
- Create cheese sauce: Gradually whisk in the milk, stirring constantly to prevent lumps. Cook until the sauce thickens and coats the back of a spoon.
- Add cheeses and seasoning: Remove the sauce from heat and stir in shredded sharp cheddar cheese, mozzarella, garlic powder, nutmeg, salt, and pepper until the cheese has fully melted and the sauce is smooth.
- Assemble casserole: Layer the prepared vegetables evenly in the greased baking dish. Pour the cheese sauce over the vegetables and gently fold to coat everything evenly.
- Prepare topping: In a small bowl, combine the breadcrumbs with 2 tablespoons of melted butter, mixing until the crumbs are fully coated.
- Add topping and cheese: Sprinkle the buttery breadcrumb mixture evenly over the casserole, then top with grated Parmesan cheese for an extra savory finish.
- Bake the casserole: Place the casserole in the preheated oven and bake uncovered for 25 to 30 minutes, or until the top is golden brown and the mixture is bubbling.
- Rest and serve: Remove the casserole from the oven and let it rest for 10 minutes before serving to allow the sauce to set slightly for easier portioning.
Notes
- Optional vegetables like zucchini and bell peppers add extra color and nutrition but can be omitted.
- To make this dish gluten-free, substitute all-purpose flour with a gluten-free flour blend and use gluten-free breadcrumbs.
- For a richer flavor, feel free to use half-and-half instead of milk.
- You can prepare the cheese sauce and vegetables in advance, then assemble and bake just before serving.
- Use freshly grated cheeses for better melt and flavor compared to pre-shredded varieties.
Keywords: cheesy vegetable casserole, broccoli cauliflower casserole, baked vegetable casserole, vegetarian casserole, cheese sauce casserole

