Place chicken breasts into the bottom of a crockpot.
Pour the Parmesan Garlic Sauce over the chicken.
Fill the empty sauce bottle with 1 cup of milk, shake, and pour into crockpot.
Add cream cheese blocks and shredded Parmesan cheese.
Stir gently to coat the chicken and combine ingredients.
Cover and cook on low for 3–4 hours or high for 2–3 hours, until chicken is fully cooked and tender.
Shred the chicken with two forks and stir to combine with the sauce.
Meanwhile, cook pasta according to package directions, then drain.
Add cooked pasta to the crockpot and stir to combine.
Serve warm, garnished with extra Parmesan if desired.
Notes
Use rotini or penne pasta for best sauce coverage. Add crushed red pepper flakes for a little heat. Reheat with a splash of milk for creaminess. Can be frozen, but add fresh pasta after thawing for best texture.