Homemade ladyfinger biscuits

Homemade ladyfingers
2/3 cup all-purpose flour
1 pinch salt
4 eggs, separated
1/2 cup sugar
1/2 teaspoon vanilla extract confectioners' sugar for sprinkling
Preheat oven to 180 degrees C. Grease baking sheets, then lightly dust with flour.
Sift together the flour and salt.
In a bowl, add the egg whites and beat with a mixer until stiff peaks form. Beat in the half of the sugar.
Combine the egg yolks and remaining sugar in a mixing bowl. Beat on medium speed with an electric mixer until blended (about 2 minutes)
combined. Sir in the vanila wiped, slowly add the tour to the egg yolks. Just mix until Add the egg whites all at once to the yolk mixture. Fold in gently until just combined.
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Lightly sift powdered sugar over the ladyfingers.
Place the baking sheets in the oven and bake at 180 degrees celcius for 20 minutes or until the outside is set. Remove the sheets from the oven and let cool for 5 minutes then remove the ladyfingers to a cooling rack.