Cook pasta according to package directions. Drain and set aside.
In a large skillet over medium heat, combine buffalo sauce, cream cheese, and ranch dressing. Stir until the cream cheese is melted and the sauce is smooth.
Add the cooked chicken to the skillet and stir to coat.
Stir in the shredded cheddar and mozzarella cheeses until melted and combined.
Add the cooked pasta to the skillet. Pour in the milk and stir until the sauce is creamy and coats the pasta.
Season with salt and pepper to taste.
Serve hot, garnished with extra cheese or ranch dressing if desired.
Notes
This buffalo chicken pasta is a crowd-pleaser! You can adjust the spice level by using more or less buffalo sauce.