Preheat your oven to 350 degrees F
Spray your donut pan with non-stick spray and set aside.
In a small bowl, whisk together the flour, baking powder, pumpkin spice, and salt set aside
In the bowl of a mixer blend the butter and sugar together until fluffy.
Add the egg and continue to mix.
Slowly add the dry ingredients 1/4 cup at a time alternating with the buttermilk.
Mix until blended.
Pour the batter into the donut pan about 1/2 to 3/4 full.
Place in the oven and bake for 15-18 minutes
While the donuts are baking, in a small bowl whisk the glaze ingredients until smooth.
When the donuts are done, glaze the donuts right away and set aside to cool.
Serve warm