2 cups confectioners' sugar
2 cups all-purpose flour
1 teaspoon baking powder
In a medium bowl, whip the eggs and sugar with an electric mixer at high speed. Mix for 6 to 10 minutes, until mixture is thick and pale. Combine the flour and baking powder together. Gradually add the flour to the egg mixture. If the dough is still sticky, you can add more flour.
On a lightly floured surface, roll the dough into long log shapes, about 1 1/2 inches in diameter, and as long as your cookie sheet. Cover with a clean towel, and let them sit out overnight.
Preheat oven to 375° F. Remove the rolls of dough from the cookie sheets and place them on a lightly floured surface. Cut into 1 1/2 inch long pieces. And return them to the baking sheets.
Bake for 15 to 20 minutes in the preheated oven, until they are a light brown. Remove from baking sheets to cool on wire racks. These cookies can be stored for a month in an airtight container.