Preheat the oven to 350°.
Mix all the ingredients together in a large bowl until well combined. With quick bread recipes, you don't want to over mix, so just use a wooden spoon or spatula instead of an electric mixer.
Pour the batter into a well-greased loaf pan (9"X5") and bake for about 60-70 minutes, until a toothpick inserted in the center comes out clean. If the bread is starting to brown a little too much on the top/sides before the center is done, you can cover with foil until the bread is completely baked and the foil will prevent the top from getting too dark.
Leave the bread in the pan for at least 20-30 minutes before removing the bread. The longer you can cool the bread in the pan, the better because the bread is so moist that if it's not cool enough, it may be a little tricky to keep it all in one piece!
Once the bread is cooled, you can make the glaze. In a small bowl, use a fork to whisk together the butter, powdered sugar and maple syrup until smooth. If the syrup is too thick, add a tablespoon or two of milk to thin it out a little bit.
If you prefer to make muffins instead of bread, pour the batter into 12 muffin cups and bake for about 30 minutes.