01 - Place the chicken thighs in a single layer at the bottom of the crockpot.
02 - Scatter the chopped onion and minced garlic evenly over the chicken pieces.
03 - In a mixing bowl, whisk together chicken broth, heavy cream, melted butter, Italian seasoning, paprika, salt, and black pepper until fully incorporated and smooth.
04 - Pour the seasoned cream mixture evenly over the chicken thighs, ensuring all pieces are coated.
05 - Cover and cook on LOW setting for 6 hours or until chicken reaches an internal temperature of 165°F and is fork-tender.
06 - About 15 minutes before serving, whisk cornstarch and cold water in a small bowl until completely smooth and no lumps remain.
07 - Stir the cornstarch slurry into the crockpot, mixing thoroughly to incorporate. Cover and cook for an additional 10–15 minutes until the gravy reaches desired consistency.
08 - Transfer chicken thighs to serving plates and spoon the thickened creamy gravy generously over the top.