Blend 2 cups sifted powdered sugar with 1/3 cup milk and 1 teaspoon pure vanilla. Stir until smooth. Dip warm doughnuts into glaze. Drain on wax paper to catch icing. You can re-use what drips off.
Spicy Glaze: Follow above recipe, omitting vanilla. Add 1/2 teaspoon cinnamon and 1/4 teaspoon nutmeg.
Orange Glaze: Follow above recipe, omitting vanilla. Substitute orange juice for milk.
Lemon Glaze: Follow above recipe, substituting lemon extract for vanilla and using lemon juice instead of milk.
For Cinnamon Flavored Sugar Coating: Add 2 teaspoons cinnamon to each 1/2 cup granulated sugar for a spicy taste.