Preheat oven to 350 degrees F. Lightly grease an 8 1/2 x 4 1/2 loaf pan.
In a medium mixing bowl, mix together the flour, baking powder, baking soda, salt, and cinnamon until well combined.
In a large mixing bowl, mix together the sugar and vegetable oil until well combined. Mix in the egg and vanilla extract, then mashed banana until well combined.
Mix the dry ingredients into the sugar and oil mixture until nearly combined, then mix in grated zucchini until just combined.
Pour batter into prepared loaf pan. Spread batter as needed to form an even layer.
Bake bread in the middle of the oven for about 45-60 minutes or until golden brown and a toothpick inserted into the middle comes out clean.
Cool bread slightly in pan, then remove from pan and cool completely on wire rack.
SNAPPY TIPS: If bread starts to brown too quickly on top before the middle is done baking, you can lightly cover the top of the bread with aluminum foil to finish baking. For best results be sure your bananas are very ripe.SNAPPY SUBSTITUTIONS: Instead of cinnamon you can use your favorite spices. You can also add some chocolate chips and/or nuts.
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