Pat chicken breasts dry and season with paprika, garlic powder, salt, and black pepper.
Heat olive oil in a large skillet over medium-high heat, then sear chicken 4-5 minutes each side until cooked through and golden.
Remove chicken from skillet and keep warm covered with foil.
In the same skillet, melt butter over medium heat, then add mushrooms and cook 3-4 minutes until tender and browned.
Add minced garlic and sauté for 1 minute until fragrant.
Add spinach and cook 2-3 minutes until wilted.
Reduce heat to low and stir in heavy cream, chicken broth, Parmesan, and Italian seasoning. Cook 2-3 minutes until sauce thickens slightly.
Season sauce with salt and pepper to taste.
Return chicken to skillet, nestling into sauce, and simmer 2-3 minutes to heat through and combine flavors.
Garnish with chopped fresh parsley before serving.