Most standard banana bread recipes call for all-purpose flour. If you want to have a good experience, it's a good idea to find a recipe that requires all-purpose flour. Many experts say that cake flour is the best flour for making banana bread, but it's something subjective. Try different types of banana bread and then come to a conclusion about which flour makes the banana bread tastiest.
For every cup of all-purpose flour that the recipe requires, you'll need to use one cup and two tablespoons of cake flour. All-purpose flour is still the most common type of flour requested in banana bread recipes you'll find on the Internet. You might even want to try several different banana bread recipes to see what types you like best.