Begin by preheating your oven to 350 degrees F and greasing a bread pan.
Make the flax egg by combining 2 tbsp of ground flaxseed with 6 tablespoons of water.
Next, mash your ripe bananas until they are 90% smooth.
Using a large mixing bowl, combine the flour, baking soda, baking powder, cinnamon, pumpkin pie spice, salt and mix until the ingredients are combined.
Next, combine the melted coconut oil, maple syrup, flax egg, banana and pumpkin puree in a medium size bowl. Use a whisk to mix all ingredients together. It will be slightly thick.
Slowly pour the wet ingredients into the dry, mixing as you go. A soft batter will form.
Add in the chocolate chips and crushed walnuts then fold them into the batter so they are equally distributed.
Pour the batter into the grease bread pan. You may need to use a spatula to get all of the batter out of the bowl because it will be a little thick.
Smooth the top of the batter with a spatula or gently tap the bread tin down against the counter a few times to even out the top layer of the batter.
Place in the oven and bake for 50-60 minutes, until you can insert a toothpick into the center of the bread and remove it cleanly.
Let the pumpkin banana bread sit for 15 minutes before cutting.
Enjoy with a delicious glass of Taittinger's Rose!