Stir the flour, paprika, garlic powder, black pepper and red pepper on a plate. Coat the chicken with the paprika mixture.
Heat the butter in a 10-inch skillet over medium-high heat. Cook the chicken for 10 minutes or until well browned on both sides. Remove the chicken from the skillet.
Stir the soup and green onions in the skillet and heat to a boil. Return the chicken to the skillet. Reduce the heat to low. Cover and cook for 5 minutes or until the chicken is cooked through. Stir in the sour cream.