Preheat the oven to 350°F (175°C) and lightly grease the pan with coconut oil.
Cut a piece of parchment paper big enough to over lap a bit on the sides of the cake pan to create a flap to help lift the cooked and cooled cake out of the pan easily. Cut a second piece if needed to fit crosswise and over the other two sides just like the first piece. Lightly greasing the pan helps hold the paper in place.
Lightly grease the parchment paper on top to help make removing the cake go smoothly (optional).
Using a large glass mixing bowl, whisk together the first five ingredients.
Using a medium glass mixing bowl, whisk together the wet ingredients.
Then add in the wet ingredients to the dry ingredients and combine well.
Gently fold in the walnuts, raisons and chopped apples.
Transfer the batter to the cake pan and bake for 30 - 40 minutes or until a tooth pick comes out clean.
Remove from the oven and let cool down for 15 minutes or so.
Once cooled, use the flaps to left the cake out of the pan in one piece, then peel the paper back from the sides. Dust with arrowroot powder if using. And you may slice directly on the parchment. Enjoy!