Preheat your oven to 350 degrees.
Put all the dry ingredients into a large bowl, big enough to hold all of your batter; pecans, flour, sugar, brown sugar salt, baking powder, cinnamon, and pumpkin pie spice.
Beat your eggs in a separate bowl. Then add and combine all the other wet ingredients into the eggs, I like a whisk for this; Carrot puree, crushed pineapple, oil, eggs, vanilla, and shredded carrots.
Add the wet mixture to the dry and fold it together until it is combined. Don't over mix.
Pour about 28 oz of batter into each pan that has been prepared with baking spray and is lined with parchment. Then cover the pans with foil, this helps the cakes bake more evenly.
Bake until done, mine took about 55 minutes. The cake is done when it starts to pull away from the sides of the pan and a toothpick inserted to the center comes out clean.
Allow the cakes to cool completely then remove then from their pans carefully.
To make decorating easier, wrap the cakes in plastic wrap and freeze, I prefer to decorate from frozen.