Preheat the oven to 350 degrees. Prepare a nonstick loaf pan with butter or nonstick cooking spray.
In a bowl, whisk together the dry ingredients: flour, baking powder, baking soda, pumpkin spice blend, cinnamon, and salt. Set aside.
In a mixing bowl, beat the oil and both sugars until the sugar is completely incorporated.
Add the eggs, pumpkin puree, bananas, and vanilla, beating until combined.
Add the flour mixture and mix just until blended. Stir in half of the nuts.
Pour batter equally into the loaf pans and spread evenly. Top with remaining nuts.
Bake for 50 to 60 minutes or until a toothpick inserted in the center comes out clean.
Cool the banana bread in the bread pan for 5 minutes before removing and placing on a wire rack to cool completely.