Preheat oven to 350 degrees. Prepare a Doughnut Pan with non-stick cooking spray.
In a medium bowl, combine flours, baking powder, and salt. Set aside.
In a stand mixer fitted with a paddle attachment, mix butter and sugar.
Add eggs and vanilla pasta.
On a low speed, add dry ingredients. Mix until combined.
Slowly stream in buttermilk. Mix until combined.
Place batter into a large piping bag.
Pipe batter so that each doughnut mold is 3/4 of the way full.
Bake for 10-12 minutes.
Place doughnuts on wire rack to cool.