Spicy Buttermilk Fried Chicken

Name: Spicy Buttermilk Fried Chicken
Ingredients: 2 cut-up fryer chickens; 1 1/4 quarts buttermilk, divided; 5 cups all-purpose flour; 3 tablespoons seasoned salt (like Lawry’s); 3 teaspoons black pepper; 2 teaspoons dried thyme; 2 teaspoons paprika; 2 teaspoons cayenne pepper; 1/4 cup organic milk; 1 pinch ground chili flake; canola or vegetable oil for frying