Step 4: Make the Creamy Cheddar Sauce
In a large skillet or saucepan, melt the butter over medium heat. Add the diced onion and cook for several minutes until softened and lightly translucent.
Stir in the minced garlic and cook for another 30 seconds until fragrant.
Sprinkle the flour over the onion mixture and stir continuously for about 1 minute. This creates a roux that thickens the sauce.
Slowly pour in the milk while whisking constantly to prevent lumps. Continue stirring as the mixture heats and thickens into a smooth sauce.
Once thickened, reduce the heat to low and stir in the shredded cheddar cheese. Mix until fully melted and creamy.
Add the sour cream, salt, pepper, and paprika. Stir until everything is smooth and well combined.
Step 5: Combine the Ingredients
In a large mixing bowl, combine the cooked noodles and broccoli.
Pour the warm cheddar sauce over the mixture and gently stir until all the noodles and broccoli are evenly coated.
The creamy sauce should cover every piece without becoming too thick or dry.
Step 6: Assemble the Casserole
Transfer the noodle mixture into the prepared casserole dish and spread it evenly.
Sprinkle the additional cheddar cheese over the top.
In a small bowl, mix the breadcrumbs with melted butter. Scatter the breadcrumb mixture evenly across the casserole to create a crispy golden topping during baking.
Step 7: Bake Until Golden and Bubbly
Place the casserole into the preheated oven and bake for 25 to 30 minutes.
The casserole is ready when the cheese is melted, the edges are bubbling, and the topping is golden brown.
For an extra crispy finish, broil the casserole for 1 to 2 minutes at the end of baking, watching carefully to avoid burning.
Step 8: Let It Rest Before Serving
Remove the casserole from the oven and allow it to rest for about 5 minutes before serving.
This short resting time helps the sauce settle and makes serving easier.
Serve warm as a complete meal or alongside a fresh salad, roasted chicken, or grilled meat.
Tips for the Best Casserole
Use Freshly Shredded Cheese
Freshly shredded cheddar melts more smoothly than pre-packaged shredded cheese and creates a creamier sauce.
Don’t Overcook the Broccoli
Slightly undercooked broccoli keeps its texture and prevents the casserole from becoming watery.
Add Protein
Cooked chicken, turkey, ham, or crispy bacon can easily turn this side dish into a complete dinner.
Make It Ahead
The casserole can be assembled ahead of time and refrigerated until ready to bake. Add a few extra minutes to the baking time if cooking directly from the refrigerator.
Storage and Reheating
Store leftovers in an airtight container in the refrigerator for up to 4 days.
To reheat, place portions in the microwave or warm the casserole in the oven at 350°F until heated through.
The casserole also freezes well. Wrap tightly and freeze for up to 2 months.
Final Thoughts
Baked Cheddar Broccoli Noodle Casserole is the kind of recipe that brings warmth and comfort to the dinner table. The creamy cheddar sauce, tender noodles, and fresh broccoli create a satisfying combination that feels homemade and timeless.
With simple ingredients and easy preparation, this casserole is perfect for family dinners, holiday gatherings, or whenever you crave a cozy baked meal packed with cheesy flavor.
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