Mix together flour, sugar, spices, baking powder, baking soda, and salt in a large bowl.
Cut butter into small pieces and cut into flour. Mixture should look like coarse crumbs.
In a separate bowl mix together the pumpkin, buttermilk, and vanilla.
Add to flour mixture and mix until the dough comes together (don't overmix).
Transfer to a lightly floured surface and knead gently 3-4 times, and then shape/pat dough into a circle about 1 ½" thick.
Slice in half, and then cut each half into 3 equal pie-shaped wedges. (I like to cut into 4 for each half, making a total of 8 scones for the circle).
Brush with egg glaze (1 egg beaten with 1 tbsp milk), and then sprinkle with Turbinado sugar.*
Bake on a cookie sheet @ 375 degrees for 20 minutes or until a toothpick comes out clean.
*I also like to ice them with buttercream icing when cool