This sounds totally crazy and weird like what is green banana flour?! However, this GRAIN-FREE flour (also gluten free) has TONS of health benefits from the resistant starch! Resistant starch is a kind of carbohydrate that RESISTS digestion in our small intestine so it has less calories per gram (3 calories per gram instead of regular carbohydrates, which, have 4) AND it helps feed our gut microflora! This means it helps our digestion and helps our good bacteria grow! Green bananas are a great source of resistant starch (RS) so why not bake with it!?