Preheat your oven to 300°F (150°C) and line a large cookie sheet with parchment paper.

In a large bowl, whisk together the all-purpose flour, granulated sugar, baking powder, salt, and lemon zest.

Create a well in the center and add the egg, melted butter, and milk. Mix until nearly combined, then knead on a flat surface until smooth.

Roll pieces of dough into ropes about 5-6 inches long and form them into knots on the cookie sheet.

Bake for 15-18 minutes or until lightly golden brown, then cool on the baking sheet.

In a small bowl, combine sifted powdered sugar, lemon juice, and milk for the glaze. Mix until desired thickness is reached.