Cheesy Chicken Spaghetti Casserole

8 ounces spaghetti, cooked
2 cups cooked chicken, diced
1 (10 ounce) can cream of chicken & mushroom soup, undiluted OR cream of chicken and herbs
2 tablespoons butter
1/3 cup milk
1/2 teaspoon onion powder
1/2 teaspoon garlic powder (or more if you like)
1/8 teaspoon pepper
1 cup mozzarella cheese, shredded
ΒΌ cup parmesan cheese

Combine cooked spaghetti, soup, butter, milk, pepper, garlic & onion powder and mozzarella cheese. Mix well and put into a 2 quart casserole dish. Top with parmesan cheese. Bake at 350 degrees for 30 minutes.