(Adapted slightly from King Arthur Flour)
2 cups mashed bananas, about 4 or 5 medium bananas
1/2 cup vegetable oil
1 cup brown sugar
2 large eggs
1 teaspoon vanilla extract
1 cup white, all-purpose flour
1 cup whole wheat flour
1 teaspoon baking soda
1/2 teaspoon baking powder
3/4 teaspoon salt
1 teaspoon ground cinnamon
1/2 teaspoon cardamom
1 tablespoon raw, turbinado sugar
1/2 teaspoon ground cinnamon
In a large bowl, stir together mashed bananas, oil, sugar, eggs and vanilla.
Mix the flours, baking soda, baking powder, salt, cinnamon and cardamom into the banana mixture. Scrape the bottom and sides and make sure ingredients are thoroughly combined.
Spoon the batter into a 9 x 5 loaf pan lined with parchment paper.
Combine turbinado sugar and cinnamon. Sprinkle on top of batter.
Bake bread at 350 degrees for 60-75 minutes, or until bread feels set on top and a knife inserted into the center comes out relatively clean.
Remove bread from the oven and let cool in the pan for 15 minutes. Then, turn the bread out on a rack to cool completely.