There are two different Fanta products mentioned in the search results: Black Fanta and What the Fanta Mystery Flavor 2023. However, only the ingredients for the latter are provided. The ingredients for What the Fanta® Zero Sugar are carbonated water, citric acid, natural flavor, caramel color, sodium citrate, malic acid, potassium benzoate (to protect taste), sucralose. There is no information on the flavor of Black Fanta, but one article mentions that it has a chocolate banana flavor. Another article mentions that the black dye used in the drink is not truly black and gets diluted back into its primary colors, so it is possible that the drink is not actually black in color.