Quick bread are a moister denser or flakier version of bread which use baking powder or baking soda for leavening (to make them rise.)
Yeast breads use yeast as leavening. They need to be kneaded in order to reach their peak fluffiness as a bread.
The thing about quick breads is that after you add the baking powder or baking soda you should mix them enough to just blend all of the ingredients, and smooth out the lumpd. If you knead quick bread they will turn out flat and ropey.
I have included the icing recipe, but iced or plain, they are sure to delight.