Beat sugar, eggs and salt togethre until light and frothy. Sprinkle the sifted flour lightly over the egg mixture with your hands. Mix lightly. Add vanilla to taste.
The secret of making ladyfingers is to mix the batter lightly and quickly and get them into the oven as fast as possible. Drop the ladyfingers on a greased baking sheet by squeezing through a cookie press or pastry bag, shaping into little finger-sized cakes or cookies. Leave plenty of space between them.
Bake in a preheated 350° oven 7 minutes, or until a delicate brown. Let cool on the cookie sheet. Sprinkle with powdered sugar.