Preheat the oven to 350 degrees F.
Line your pan with parchment and spray with baking spray.
In a large bowl, mix together carrots, eggs, and maple syrup and whisk to combine.
In a separate bowl, combine the flours, baking soda, baking powder, spices, and salt and whisk lightly with a fork.
Add to the wet ingredients and stir to combine. Fold in the walnuts.
Bake for 28-32 minutes until tester comes out clean. Let cool briefly in pan and finish cooling completely on a rack before frosting.
To make the frosting - Beat together the butter, cream cheese, and powdered sugar with a hand or stand mixer until smooth and fluffy.
Spread over cooled cake and garnish with the candied ginger if using. Enjoy!