Preheat oven to 220 ℃ .
Whisk together flour, baking powder, baking soda, salt, Homemade Pumpkin Spice Blend and brown sugar until well blended.
Add butter and use a pastry cutter or your hands to incorporate the butter into the dry ingredients (large pieces of butter should no longer be visible).
Pour mixture into a large mixing bowl and create a well in center.
In a separate bowl whisk together chilled pumpkin puree, buttermilk, egg, vanilla extract and honey.
Pour mixture into well in flour/butter mixture. Stir mixture with a wooden spoon to incorporate, then knead in bowl (or on work surface) by hand several times to bring mixture together.
Dust a work surface with flour then invert dough onto surface. Pat and shape dough into an even 8-inch round. Using a large knife, slice into 8 equal wedges (dust knife with flour as needed while cutting, it will be fairly sticky).
Transfer scones to a lined baking sheet.
Brush tops with 1 Tbsp half and half then bake in preheated oven 13 - 15 minutes until tops are golden brown, be careful to not burn them.
Transfer to a wire rack and let them cool.