01 - Preheat oven to 350°F. Line 2 baking sheets with parchment paper or silicone baking mats.
02 - In a medium bowl, whisk together the flour and salt until well blended.
03 - In a large bowl, combine the melted butter and granulated sugar. Whisk until smooth and fully incorporated.
04 - Add the egg, milk, orange zest, and vanilla extract to the butter mixture. Whisk until the mixture is uniform and smooth.
05 - Add the dry ingredients to the wet ingredients. Stir gently until just combined. The batter will be thin and runny.
06 - Drop rounded teaspoons of batter onto prepared baking sheets, spacing them at least 3 inches apart. The cookies will spread considerably during baking.
07 - Bake for 7-9 minutes, or until the edges are golden brown and the cookies appear lacy and crisp. Watch closely during the final minutes to prevent burning.
08 - Let cookies cool on the baking sheet for 2 minutes to set. Gently transfer to a wire rack to cool completely before handling.
09 - Once cooled, drizzle melted dark chocolate over the cookies or dip the edges. Allow chocolate to set before serving.