Make the lemon sugar

• Rub the lemon zest into the sugar with your fingertips until fragrant and moist.
• Add the softened butter and work it into the lemon sugar.

Make the dough

• Add the egg yolk and lemon juice and mix to combine.
• Add the flour and mix until a soft, buttery dough forms, even if it looks dry at first.

Roll out the dough

• Roll the dough out on a lightly floured surface.
• Place a sheet of parchment paper on top while rolling to keep it smooth and prevent sticking.

Cut the cookies

• Cut out rounds with a cookie cutter.
• Cut a smaller shape out of the centre of half of the rounds to make the tops.

Bake the cookies

• Place the cookies on a baking tray.
• Bake until lightly golden at the edges.

Make the lemon glaze

• Whisk the powdered sugar with the lemon juice.
• Adjust the consistency until thick but pourable, then glaze the cookie tops.

Assemble the cookies

• Spread lemon curd on the whole cookies.
• Top with the glazed cut-out cookies.