Baked Cheese Spaghetti Casserole with Creamy Cheddar Sauce

Prep: 15 minCook: 30 min6 servingsmediumAmerican
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

6 servings
  • 12 oz spaghetti, uncooked
    penne pasta1:1vegetarian

    holds sauce better

    Full guide →
  • 2 cups cheddar cheese, shredded
    mozzarella cheese1:1vegetarian

    milder flavor

    Full guide →
  • 1 cup milk
    heavy cream1:1vegetarian

    richer sauce

    Full guide →
  • 2 tbsp butter
  • 1 tsp salt
  • 1 tsp black pepper

Instructions

  1. 1

    Preheat oven to 350°F

  2. 2

    Cook spaghetti according to package instructions and drain

  3. 3

    Melt butter in a saucepan over medium heat

  4. 4

    Stir milk, salt, and pepper into melted butter

  5. 5

    Add cheddar cheese to saucepan and stir until melted and smooth

  6. 6

    Combine cooked spaghetti and cheese sauce in a large bowl and mix well

  7. 7

    Transfer mixture to a baking dish

  8. 8

    Bake for 20-25 minutes until bubbly and golden on top

  9. 9

    Cool for a few minutes before serving

Tips

Tip 1

Reserve a cup of pasta cooking water to thin the sauce if it becomes too thick.

Tip 2

Add breadcrumbs on top before baking for extra crunch and texture.

Tip 3

Let the casserole rest 5 minutes after baking for easier serving and slicing.

Good to Know

Storage

Refrigerate covered for up to 3 days. Reheat in oven at 350°F until warmed through.

Make Ahead

Assemble casserole up to 1 day ahead, cover and refrigerate. Add 10 minutes to baking time if baking from cold.

Serve With

Serve hot directly from the baking dish with a side salad or steamed vegetables.

See pairing guide →

Common Mistakes

Watch

Don't skip draining pasta completely to avoid watery casserole

Watch

Stir cheese sauce constantly to prevent burning and ensure smooth melting

Substitutions

cheddar cheese
mozzarella cheese1:1vegetarian

milder flavor

Full guide →
spaghetti
penne pasta1:1vegetarian

holds sauce better

Full guide →
milk
heavy cream1:1vegetarian

richer sauce

Full guide →
Find more 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.