01 -  Set oven to 400°F and line a baking sheet with parchment paper. 
 02 -  Whisk together all-purpose flour, granulated sugar, baking powder, baking soda, salt, chili flakes, and ground black pepper in a large bowl. 
 03 -  In a separate bowl, thoroughly mix pumpkin purée, whole milk, vegetable oil or melted butter, eggs, and minced garlic. 
 04 -  Pour wet mixture into dry ingredients and gently stir just until the dough forms. Avoid overmixing. 
 05 -  Fold in shredded sharp cheddar cheese and chopped scallions or chives, if using. 
 06 -  Transfer dough to a lightly floured surface. Pat into a 1-inch thick round and slice into 8 evenly sized wedges. 
 07 -  Position wedges on the prepared baking sheet, spacing apart, and bake for 18–22 minutes until golden brown and a toothpick comes out clean. 
 08 -  Transfer scones to a wire rack to cool for 5 minutes before serving warm.