Preheat the Oven – Set your oven to 300°F (150°C) and line a baking sheet with parchment paper.
Mix the Dough – In a large bowl, whisk together flour, sugar, baking powder, salt, and lemon zest. Make a well in the center and add the egg, melted butter, and milk. Stir with a fork until almost combined, then knead gently into a smooth dough.
Shape the Cookies – Roll small pieces of dough into thin ropes (5-6 inches long) and form them into knots or circles. Place them on the prepared baking sheet.
Bake to Perfection – Bake for 15-18 minutes, or until lightly golden. Let cool completely before glazing.
Prepare the Glaze – In a bowl, whisk powdered sugar, lemon juice, and milk until smooth. Adjust the thickness by adding more or less milk.
Glaze & Serve – Dip or drizzle cookies with the lemon glaze and let set before serving. Optionally, dust with powdered sugar for an extra touch.