Preheat the oven to 350°F and spray a 9×13-inch baking dish with nonstick spray.
In a medium bowl, whisk together the cream of mushroom soups and milk and then stir in the chopped parsley. Set aside.
In a large bowl, combine the ground beef, crushed saltines, milk, Italian seasoning, garlic powder, onion powder, paprika, and cayenne pepper. Season with salt and pepper to taste.
Using a spoon or your hands, combine the ingredients until mixed. Gently form into even-sized patties.
Place 1 cup of flour in a shallow dish. Season the flour with salt and pepper. Dredge all the patties in the flour.
Heat a large skillet over medium-high heat and melt the butter and add the olive oil. Once hot, sear patties on both sides until golden brown. Work in batches. It will continue cooking in the oven.
Transfer the browned patties to the greased baking dish. Pour the gravy evenly over the top of the patties. Cover the dish with aluminum foil.
Place baking dish in the oven and bake for 30 to 40 minutes or until cooked through.