Season the chicken breasts with garlic powder, thyme, paprika, rosemary and a pinch of salt.
Drizzle olive oil on the bottom of the crock pot and place seasoned chicken inside and add marsala wine, broth on top with garlic and mushrooms.
Cook on high in the crockpot for 3-4 hours.
Remove the chicken with a slotted spoon and add the cream cheese, parmesan, lemon juice and heavy cream to the crockpot and whisk until smooth for 3-5 minutes the return chicken to sauce and crock pot for 20-30 minutes. If you would like the sauce thicker- add more cheese.
Garnish with basil or fresh parsley.