For the pumpkin spice latte glaze, mix ¾ cup powdered sugar with 2 tablespoons of milk. Dip the donuts in the glaze and set aside. In another bowl dissolve the coffee powder in 1 tablespoons of hot water. Add the remaining powdered sugar and the pumpkin pie spice. Mix well and drizzle the coffee glaze over the previously glazed donuts. Place back onto the cooling rack or on a plate to let the glaze set.