Crack the eggs into a bowl, add sugar, salt, baking powder and milk. Whip thoroughly until smooth. Gradually sift flour into the mixture and knead dough. Set aside for 5 minutes. Roll out the dough into a very thin layer on a floured table. Sprinkle flour on top. Cut the layer into 3-3.5 cm wide strips. Then cut the strips into 4-5 cm long diamonds. Warm up butter oil in a saucepan and brown the dough. Allow to cool, sprinkle with powdered sugar and serve the dish.