Preheat the oven to 425 degrees. Line a baking sheet with a parchment paper.
Make the scones by mixing the dry ingredients in a bowl. Use a pastry blender to cut in the butter until the mixture is crumbly.
In another bowl, whisk the pumpkin, 3 tablespoons of half and half, the egg, and vanilla together. Slowly add the dry mixture and mix until just combined. Don't over-mix the batter.
Form a ball and place it on a lightly floured surface. Flatten the ball into a rectangle about 1 inch thick. Cut the rectangle into four squares then cut each square diagonally in half to form a triangle.
Place the triangles onto the baking sheet lined with parchment paper. Brush the top of each scone with the last tablespoon of half and half.
Bake for 14-16 minutes or until golden brown. Let them cool on a wire rack.
Make the spiced glaze by whisking the powdered sugar, milk, vanilla, cinnamon, nutmeg, ginger, and cloves until smooth and creamy.
Once the scones have cooled, drizzle each scone with the glaze then serve immediately. Enjoy.