Ingredients

Preparation time: 20 minutes Cooking time: 35–45 minutes Servings: 6

For the casserole

• 4 medium potatoes, peeled and cut into cubes
• 3 cups broccoli florets, fresh or frozen
• 2 cups shredded cheddar cheese
• ½ cup mozzarella cheese (optional)
• 2 tablespoons butter
• 2 cloves garlic, minced
• 1 small onion, finely chopped
• 1 cup milk
• ½ cup sour cream
• 2 tablespoons all-purpose flour
• ½ teaspoon salt, or to taste
• ½ teaspoon black pepper
• ½ teaspoon paprika
• ½ teaspoon dried oregano (optional)

For the topping

• ½ cup breadcrumbs
• 1 tablespoon melted butter
• 2 tablespoons grated Parmesan cheese (optional)

Instructions

Step 1: Prepare the potatoes

Preheat your oven to 190°C (375°F). Lightly grease a medium-sized baking dish with butter.

Place the potato cubes in a saucepan and cover them with water. Bring the water to a boil, then simmer for 8–12 minutes, until the potatoes are just fork-tender.

Drain thoroughly and set aside. Avoid overcooking the potatoes because they will continue cooking in the oven.

Step 2: Cook the broccoli

Bring a saucepan of water to a boil and add the broccoli florets. Cook for 2–3 minutes until they turn bright green and become slightly tender.

Drain immediately and allow the broccoli to dry well. If using frozen broccoli, thaw it completely and remove excess moisture before adding it to the casserole.

Step 3: Make the creamy cheese sauce

Melt the butter in a saucepan over medium heat. Add the chopped onion and cook for 3–4 minutes until softened.

Add the minced garlic and cook for another 30 seconds until fragrant.

Sprinkle the flour over the onion mixture and stir for about one minute. Gradually pour in the milk, whisking continuously to prevent lumps.

Cook for 2–4 minutes until the sauce thickens slightly. Reduce the heat and stir in the sour cream, salt, black pepper, paprika, and oregano.

Remove the pan from the heat and add 1½ cups of shredded cheddar cheese. Stir until the cheese melts into a smooth, creamy sauce.

Step 4: Combine the ingredients

Place the cooked potatoes and broccoli in a large mixing bowl. Pour the cheese sauce over the vegetables and gently stir until everything is evenly coated.

Transfer the mixture to the prepared baking dish and spread it into an even layer.

Sprinkle the remaining cheddar cheese and the optional mozzarella over the top.

Step 5: Add the crispy topping

In a small bowl, combine the breadcrumbs, melted butter, and Parmesan cheese.

Sprinkle the mixture evenly over the casserole. This creates a crunchy, golden topping that contrasts beautifully with the creamy filling.

If you prefer an extra-cheesy casserole, you can skip the breadcrumbs and add a little more shredded cheese instead.

Step 6: Bake until golden

Place the casserole in the preheated oven and bake uncovered for 25–35 minutes, until the cheese is melted, the edges are bubbling, and the topping is golden brown.

If the top begins browning too quickly, loosely cover the dish with foil for the remaining cooking time.

Remove the casserole from the oven and let it rest for 5–10 minutes before serving. This helps the sauce settle and makes the casserole easier to portion.

Tips for the Best Cheesy Broccoli Potato Casserole

• Choose the right potatoes: Yukon Gold potatoes create a creamy texture, while russet potatoes produce a fluffier result.
• Drain the vegetables well: Excess water can make the cheese sauce thin and watery.
• Shred cheese at home: Freshly shredded cheese generally melts more smoothly than pre-shredded varieties.
• Avoid overcooking the broccoli: Briefly cooking it before baking helps preserve its color and texture.
• Season the sauce properly: Garlic, black pepper, paprika, and herbs add flavor without requiring excessive salt.
• Allow time to rest: A few minutes of resting helps the casserole hold together when served.

Delicious Recipe Variations

1. Extra-Cheesy Potato Casserole

Add more cheddar, mozzarella, or Monterey Jack cheese. A little Parmesan adds a savory flavor and makes the topping even more delicious.

2. Broccoli Potato Bacon Casserole

Add cooked, crumbled bacon to the vegetable mixture before baking. For a heartier meal, you can also include cooked diced chicken.

3. Spicy Cheesy Casserole

Add chili flakes, cayenne pepper, or chopped jalapeños to the sauce for a spicy twist.

4. Broccoli Cauliflower Potato Casserole

Replace some of the potatoes with cauliflower florets. Briefly cook the cauliflower first and drain it thoroughly to prevent excess moisture.

5. Lighter Cheesy Casserole

Replace some of the sour cream with plain Greek yogurt, use a moderate amount of cheddar, and increase the broccoli-to-potato ratio.

What to Serve with This Casserole

Cheesy Broccoli Potato Casserole pairs well with grilled chicken, roasted fish, baked chicken, fresh green salads, steamed vegetables, or homemade artisan bread.

For a vegetarian meal, serve it with a crisp cucumber and tomato salad and a slice of crusty bread. It can also be served as a side dish alongside your favorite main course.

Storage and Reheating

Refrigeration: Store leftovers in an airtight container within two hours of cooking. Refrigerate for 3–4 days.

Freezing: Freeze individual portions in freezer-safe containers for up to 2–3 months for best quality. The creamy sauce may change texture slightly after thawing.

Reheating: Warm individual portions in the microwave until steaming hot, or reheat in an oven at 175°C (350°F) until heated through.

Make-ahead preparation: Assemble the casserole up to 24 hours in advance, cover, and refrigerate. Add the breadcrumb topping just before baking. Allow extra baking time if the dish is cold.

Frequently Asked Questions

Can I use frozen broccoli?

Yes. Thaw it first and drain away excess water before combining it with the potatoes.

Can I make this casserole without sour cream?

Yes. Plain Greek yogurt or a little cream cheese mixed with milk can work as a substitute.

Why is my casserole watery?

Excess moisture from broccoli or potatoes is a common cause. Drain the vegetables well and allow the cheese sauce to thicken before combining the ingredients.

Can I make it without flour?

Yes. Mix a small amount of cornstarch with cold milk and add it to the sauce. Heat gently until thickened before adding the cheese.

How do I know when the casserole is ready?

The cheese should be melted, the edges should bubble, and the center should be thoroughly hot.

Conclusion

Cheesy Broccoli Potato Casserole is an easy, comforting recipe that combines tender potatoes, nutritious broccoli, creamy cheese sauce, and a delicious golden topping. With simple ingredients and straightforward instructions, it is ideal for weeknight dinners, family gatherings, and special occasions.

For the best results, cook the vegetables until just tender, prepare a smooth cheese sauce, drain away excess moisture, and bake until bubbling and golden.

Serve it warm with a fresh salad, roasted chicken, or crusty bread for a satisfying homemade meal that everyone can enjoy.