Preheat oven to 350℉. Line a large rimmed baking sheet with parchment paper.
In a large bowl using a hand held mixer, cream the butter and brown sugar together until light and fluffy. Next, add in the pumpkin puree, vanilla, arrowroot powder and beat together until combined.
In medium bowl, whisk together the flour, almond flour, pumpkin spice, baking soda and salt until combined. Add the flour mixture into the wet mixture. Use a spatula to combine. Fold in the white chocolate, you may need to use your hands. Refrigerate the dough for 45 minutes. Next form 2 tablespoons size balls and dredge them in the pumpkin spice-sugar mixture. Put the cookies onto the baking sheet, press them down slightly. Bake for 10-11 minutes. Transfer cookies to a wire rack to allow to cool.