Preheat oven to 325 degrees F and oil donut baking pan.

In a medium sized bowl add flour, salt, baking powder, and mix.

In a large bowl add sugar, egg, milk, vanilla extract, butter, and beat until well combined. Add dry ingredients into the wet ingredients and mix, but don't over mix.

In a ziplock bag add the batter and snip of one of the corners of the edges and pipe it into the donut pan.

Bake for 12-15 minutes.

In another bowl, add ¼ cup milk and slowly add powdered sugar ¼ cup at a time while mixing.