In a large bowl, whisk together the flour, sugar, spices, baking powder, baking soda and salt. Cut the butter into small pieces and blend into the flour mixture with a pastry blender or two knives. The mixture should look like coarse crumbs. Stir in the raisins and pecans, if using. In a separate bowl mix together the buttermilk, pumpkin puree and vanilla and then add the buttermilk mixture to the flour mixture. Mix just until the dough comes together. Do not overmix the dough. Whisk the egg and cream/milk together to make the egg wash (see step 3).
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