01 - Place the chicken thighs in the bottom of the slow cooker, arranging them in a single layer for even cooking.
02 - Sprinkle the finely chopped onion and minced garlic evenly over the chicken thighs.
03 - In a mixing bowl, whisk together chicken broth, heavy cream, butter, Italian seasoning, paprika, salt, and black pepper until fully incorporated and smooth.
04 - Pour the creamy mixture evenly over the chicken and aromatics in the slow cooker.
05 - Cover and cook on LOW setting for 6 hours or until the chicken reaches an internal temperature of 165°F and is fork-tender.
06 - About 15 minutes before serving, combine cornstarch and cold water in a small bowl, stirring until completely dissolved and smooth.
07 - Stir the cornstarch slurry into the slow cooker, cover, and cook for an additional 10–15 minutes until the gravy reaches desired thickness.
08 - Plate the chicken thighs and spoon the creamy gravy generously over the top.