Baked Cheese Spaghetti Casserole with Creamy Cheddar Sauce

A comforting baked pasta casserole featuring tender spaghetti noodles coated in a rich, creamy cheddar cheese sauce. This family-friendly dish transforms simple pantry ingredients into a satisfying meal that's perfect for weeknight dinners or potluck gatherings. The casserole bakes until bubbly and golden on top, creating a delightful contrast of textures between the creamy interior and slightly crispy surface.
Ingredients
Instructions
- 1
Preheat oven to 350°F
- 2
Cook spaghetti according to package instructions and drain
- 3
Melt butter in a saucepan over medium heat
- 4
Stir milk, salt, and pepper into melted butter
- 5
Add cheddar cheese to saucepan and stir until melted and smooth
- 6
Combine cooked spaghetti and cheese sauce in a large bowl and mix well
- 7
Transfer mixture to a baking dish
- 8
Bake for 20-25 minutes until bubbly and golden on top
- 9
Cool for a few minutes before serving
Tips
Reserve a cup of pasta cooking water to thin the sauce if it becomes too thick.
Add breadcrumbs on top before baking for extra crunch and texture.
Let the casserole rest 5 minutes after baking for easier serving and slicing.
Good to Know
Refrigerate covered for up to 3 days. Reheat in oven at 350°F until warmed through.
Assemble casserole up to 1 day ahead, cover and refrigerate. Add 10 minutes to baking time if baking from cold.
Serve hot directly from the baking dish with a side salad or steamed vegetables.
Common Mistakes
Don't skip draining pasta completely to avoid watery casserole
Stir cheese sauce constantly to prevent burning and ensure smooth melting
Substitutions
FAQ
Can I freeze this casserole?
Yes, freeze assembled unbaked casserole up to 3 months. Thaw overnight in refrigerator before baking, adding 15 extra minutes to cook time.
What if my cheese sauce is lumpy?
Remove from heat and whisk vigorously. If still lumpy, strain the sauce or blend briefly with an immersion blender.
How long will leftovers keep?
Properly stored leftovers will keep in the refrigerator for 3-4 days. Reheat individual portions in microwave or oven.