A great alternative recipe when you do it have buttermilk on hand.
Made with 1/3c butter vs oil (should have beaten in bowl before adding bananas/eggs to prevent clumps, would need to reorder recipe next time). Added 1c walnuts, would reduce this to 1/2 for next time.
Used 1/2c brown sugar and 1/4c white, would repeat.
Had three bananas on hand, but could use 4 and reduce sugar to 1/3 each.