Preheat oven to 425 degrees. In a large mixing bowl, sift together (or stir with a whisk), flour, sugar, baking powder and salt. Next add buttermilk, egg, butter and vanilla.
Mix until just combined.Scoop batter into a large ziplock style bag, or large piping bag and snip off the tip to fill doughnut pan.
Fill each doughnut cup approximately 1/3- 1/2 full.The batter will rise quite a bit during baking.
Bake 5-7 minutes or until the top of the doughnuts spring back when touched.
Cool in pan 1-2 minutes, then transfer to a cooling rack.
Time to make the frosting! In a small bowl, stir together sugar, milk and extract until sugar is completely dissolved.Use immediately to glaze doughnuts. Dip each donut in glaze, then set on a plate.
Time to make the frosting! In a small bowl, stir together sugar, milk and extract until sugar is completely dissolved.Use immediately to glaze doughnuts. Dip each donut in glaze, then set on a plate