Add the dry pasta, broth, milk, frozen broccoli, frozen carrots, garlic powder, onion powder, salt, and pepper to a large pot or deep skillet.

Bring to a boil over high heat, then reduce to medium heat and cook for 12-15 minutes, stirring frequently, until pasta is tender and most of the liquid is absorbed.

Remove from heat and stir in the cheddar cheese and mozzarella cheese until completely melted and creamy.

Let stand for 3-5 minutes to thicken, then stir again and serve immediately.