This simple beginner's recipe for a moist gluten free banana bread uses regular rice flour. (happyandharried.com)
To make very fine rice flour, process regular rice flour in a food processor, blender or clean coffee grinder until very fine. (glutenfreeandmore.com)
But if you decide to substitute not just regular rice flour but mochiko for the wheat flour, beware that the results will hardly resemble a cupcake! (isachandra.com)