Heat oven to 350 degrees F. Lightly spray donut pan with cooking spray; set aside.
In medium bowl, whisk together first 7 ingredients. Add remaining ingredients. Blend on medium speed 2 minutes, scraping bowl often, until ingredients are blended.
Spoon batter into prepared pan, filling each donut well about halfway full. Bake at 350 degrees F. for 10-14 minutes, until tops are set and bounce back when lightly pressed with finger. Cool 10 minutes in pan; transfer to a cooling rack.
Respray pan and In small bowl, combine 1 cup sugar and pumpkin pie spice. When donuts are cool enough to handle, coat donuts with sugar mixture.repeat baking process with remaining batter.