Prepare your workspace by preheating your oven to 400°F (200°C) and lining a baking sheet with parchment paper. This high temperature is crucial for creating that perfect scone exterior.
Whisk the dry ingredients together in a large bowl—flour, sugar, baking powder, salt, and all the spices. Make sure they’re well incorporated for even flavor distribution throughout your scones.
Cut in the cold vegan butter using a pastry cutter or fork until the mixture resembles coarse crumbs about the size of peas. The cold butter creates pockets of steam when baking, which is essential for a flaky texture.
Mix the wet ingredients in a separate bowl—pumpkin puree, non-dairy milk, maple syrup, and vanilla extract—until smooth and well combined.
Gently fold the wet ingredients into the dry mixture using a spatula or wooden spoon, being careful not to overmix. Stop when just combined; overmixing will make your scones tough.
Turn the dough onto a lightly floured surface and shape it into a circle about 1-inch thick. The dough will be slightly sticky but workable.
Cut the circle into 8 equal triangles using a sharp knife or bench scraper, then transfer them to your prepared baking sheet, leaving about 2 inches between each scone.
Bake for 22-25 minutes until the edges are golden brown and a toothpick inserted in the center comes out clean. The tops should feel firm to the touch.
Cool completely on a wire rack before glazing. This takes about 15-20 minutes and prevents your glaze from melting off.
Prepare the maple glaze by whisking together powdered sugar, maple syrup, non-dairy milk, and vanilla until smooth. Add liquid gradually until you reach a thick but pourable consistency.
Dip the tops of each cooled scone into the glaze, allowing excess to drip off, then return to the rack to set.
For the optional spiced drizzle, mix the ingredients in a small bowl and transfer to a plastic bag. Snip the corner and drizzle decoratively over the glazed scones for that signature Starbucks look.