Step 1: Cook the Pasta

1. Bring a large pot of salted water to a boil.
2. Cook spaghetti according to package instructions until al dente.
3. Drain and set aside.

Step 2: Prepare the Meat Sauce

1. In a large skillet, cook ground beef over medium heat until browned.
2. Drain excess grease and add spaghetti sauce, garlic powder, onion powder, and Italian seasoning.
3. Simmer for 5 minutes, then set aside.

Step 3: Make the Creamy Mixture

1. In a large bowl, mix cream cheese and sour cream until smooth.
2. Stir in the cooked spaghetti and toss until evenly coated.

Step 4: Assemble the Casserole

1. Preheat oven to 375°F (190°C) and grease a 9×13-inch baking dish.
2. Spread half of the meat sauce in the bottom of the dish.
3. Layer the cream cheese-coated spaghetti over the sauce.
4. Pour the remaining meat sauce over the top.
5. Sprinkle mozzarella and Parmesan cheese evenly over the dish.

Step 5: Bake to Perfection

1. Cover with foil and bake for 25 minutes.
2. Remove foil and bake for an additional 5-10 minutes until the cheese is golden and bubbly.
3. Remove from oven, garnish with fresh parsley, and serve hot!