To a Crockpot, whisk together honey dijon dressing, broth, garlic powder, and seasoning salt or salt and black pepper.
Add the chicken to the Crockpot and coat well. Cover and cook on high 2-3 hours or low 6-7 hours.
When the cooking time is complete, transfer the chicken to a bowl or cutting board. Shred or cut the chicken to your desired size.
In a small bowl, whisk together cornstarch and heavy cream. Whisk the mixture into the crockpot and add the cream cheese. Cover and cook on high 10 minutes.
Whisk the sauce vigorously until the cream cheese has dissolved, then return the chicken to the Crockpot. Cover and allow chicken to heat back up for 5 minutes on the warm setting.
Serve the chicken as is or over noodles, rice, or potatoes. Optional, garnish with fresh parsley.