Preheat oven to 375 degrees. Grease the bottom and sides of a 8 ½ x 4 ½ loaf pan with butter or coconut oil and line with unbleached parchment paper, if desired.
In a large bowl whisk together the flour, baking soda, baking powder and salt. Set aside.
Place the almond pulp, maple syrup, melted butter or coconut oil, eggs and vanilla in a blender and process until combined. Or whisk well in a medium bowl.
Add the wet ingredients to the dry ingredients and combine until just blended. Fold in the mashed bananas and nuts.
Pour into the prepared pan and bake for 50-60 minutes, or until a toothpick inserted in the center comes out clean. Cool in the pan 10 minutes and then remove the bread and transfer to a rack.