Preheat the oven to 425. Line a large baking sheet with parchment paper.
Combine the first 5 ingredients in a food processor. Pulse until the butter is thoroughly cut in.
Combine the milk and the coffee. With the processor running stream in until a ball of dough forms.
Separate the dough into two balls. Press each on the prepared baking sheet into a 12-inch circle. Cut into 8 wedges. Separate the triangles so there is room between them.
Bake the scones for 14-16 minutes or until golden. Let cool completely.
Stir together the ingredients for the glaze, adding milk as needed for the right consistency. Drizzle over the cooled scones.
Notes
Glaze - Alternatively, you can mix fresh brewed and chilled espresso with the powdered sugar to make the glaze.