Step 1

Place an oven rack in the center of the oven. Preheat the oven to 350 degrees F. Butter and flour a 9- by 5- by 3-inch loaf pan. Set aside.

Step 2

In a medium bowl, whisk together the flour, baking soda, salt, baking powder, cinnamon and nutmeg. In a large bowl, beat the sugar, oil, eggs and vanilla until blended. Stir in the bananas and blueberries. Add the dry ingredients and stir just until blended.

Step 3

Pour the batter into the prepared loaf pan. Bake until a cake tester inserted in the center of the loaf comes out clean, about 1 hour. Cool for 15 minutes. Remove the loaf from the pan and cool completely on a wire rack, about 2 hours.