Preheat oven to 350°F (175°C).

Cook spaghetti according to package directions until al dente. Drain and set aside.

In a bowl, blend cream cheese with sour cream until smooth.

In a skillet, brown ground beef over medium heat until cooked through. Drain excess fat.

Stir in marinara sauce, garlic powder, and Italian seasoning. Simmer 5 minutes. Season with salt and pepper.

In a baking dish, layer half the spaghetti, then cream cheese mixture, beef sauce, and half the mozzarella. Repeat layers.

Bake for 25–30 minutes or until cheese is golden and bubbly.

Serve hot and enjoy!