1. Beat egg yolks, adding gradually half of the sugar. Continue beating until thick. Add vanilla.
  2. Beat egg whites until foamy. Beat other half of the sugar, sprinkling about 2 tbsps at a time.
  3. Fold in beaten egg yolks and flour alternately to beaten egg whites.
  4. Line baking sheet with unglazed (parchment) paper.
  5. Using decorating tube, force batter onto the baking sheet in strips about 4" long and " wide, or drop from end of spoon to form rounds.
  6. Sprinkle top of powdered sugar.
  7. Bake in moderate oven at 350 deg F for 12-15 mins.