Preheat oven to 400 F. Prepare baking sheet with silicone mat or parchment paper.
In a large bowl, combine the flours, pumpkin pie spice, baking powder, baking soda and salt. Whisk.
In a separate bowl, combine the maple syrup, pumpkin puree, yogurt and vanilla. Whisk.
Add the cold shredded butter to the dry ingredients. Mix until just combined, and all butter is covered with flour and in a bit smaller pieces.
Add the wet ingredients and mix just to combine.
Lay the mixture on a lightly floured counter and flatten into an 8-inch round. Cut it into eight pieces then lay each piece onto the prepared baking sheet.
Bake for about 14 minutes, or until just turning light brown on the bottom and fully cooked through.
If icing, let cool on a wire rack.
If not, serve warm, with butter.