This is an incredibly moist and delicious banana bundt cake/banana bread; the best one I've ever tasted. It also makes great muffins. It is so good, I don't feel it needs the optional glaze but I've included the instructions below if you want to make it. You can also simply dust with powdered sugar. The recipe is from Dorie Greenspan's fabulous cookbook, "Baking: From My Home to Yours". You can reduce the amount of butter by up to a 1/2.