Pre-heat oven to 350F/180C. Line a baking sheet with parchment paper.
In a large bowl combine with a fork, pastry blender or clean hands the flour and butter until coarse crumbs appear, add the egg and sugar and start to with a fork, then add the zest, vanilla, baking powder and salt. Mix until almost combined, then move to a flat surface and gently knead to form a soft compact dough.
Pat the dough into a ½-¾ inch thick rectangle, cut into strips, I made 13 strips, place the strips on the prepared baking sheet approximately 1 inch apart, sprinkle with granulated sugar and bake 15-20 minutes or until lightly golden brown. Let sit 5-7 minutes on the baking sheet then move to a wire rack to cool completely. Dust with powdered sugar if desired before serving. Enjoy!
Notes
How to store the Sicilian Dunking Cookies
Store: Cool completely then store at room temperature in an airtight container for 3-5 days. Freeze: Cool then place cookies in a freeze safe container or zip top bag and store for up to 3 months. Thaw at room temperature and enjoy. Place a piece of parchment paper between cookies to prevent sticking.