Season the chicken: Place the chicken in the Crockpot.
Sprinkle over the Italian seasoning, garlic powder, onion powder, salt, and pepper.
Add the liquids: Pour in the chicken broth around the chicken. This keeps everything moist and builds the base for the sauce.
Slow cook: Cover and cook on Low for 3.5 to 4.5 hours, or on High for 2 to 3 hours, until the chicken is just cooked through and tender. Avoid overcooking.
Shred or slice: Transfer the chicken to a plate and shred with two forks (or slice, if you prefer chunks).
Return it to the Crockpot.
Make it creamy: Add the cream cheese cubes, butter, and Parmesan to the Crockpot. Stir gently until the cream cheese begins to melt. Switch the heat to Warm or Low.
Adjust the sauce: If the sauce seems too thick, stir in heavy cream a little at a time until it’s smooth and pourable.
If it’s too thin, mix the cornstarch slurry and stir it in. Cover and cook 10 to 15 minutes to thicken.
Taste and finish: Taste and adjust salt and pepper. Add chopped parsley or basil for freshness.
Serve: Spoon the creamy chicken over pasta, rice, or potatoes.
Garnish with extra Parmesan if desired.