Preheat oven to 400 degrees F.
Sift together dry ingredients; flour, baking powder, salt, sugar, all spices. Using a pastry blender, cut in the butter to coat pieces with flour. The mixture should look like coarse crumbs.
Mix together the heavy cream, vanilla, and the pumpkin puree in a bowl. Make a well in the center of the flour mixture and pour in the heavy cream and pumpkin puree mixture. Fold everything together just to incorporate.
On a lightly floured surface, press dough out into a large circle. Cut the circle into 8 to 12 wedges and place each wedge on an ungreased baking sheet. Brush each wedge with heavy cream and sprinkle some coarse sugar on each wedge if desired.
Bake 15-20 minutes until brown.