Make the chia egg - add 2 tbsp of chia seeds with 6 tbsp water. Mix well. Set aside for 5 minutes until the mixture thickens and a gel forms.
Add all the dry ingredients in a mixing bowl - white flour, baking powder, baking soda, pumpkin spice, cardamom powder, and salt. Mix.
In a large bowl, add the wet ingredients - oil, pure pumpkin puree, vanilla, chia eggs, water, light brown sugar, and white sugar. Mix well.
Add the dry ingredients to the wet ingredients. Mix, but do not over mix.
Add the chopped pistachios and fold.
Transfer the pumpkin batter to a loaf pan.
Mix the 1/2 tsp cinnamon powder and 1 tbsp sugar to make a topping.
Top with the sugar topping. Bake for 50 minutes at 350 degrees.
Pumpkin Bread is ready. Let it cool completely before frosting.