Preheat the oven to 350F then line a baking sheet with parchement paper and set it aside.
Cream the butter, granulated sugar, and powdered sugar together until smooth and creamy.
Whisk in the egg, the vanilla butter emulsion, and the lemon extract and mix until combined.
Mix in the flour, baking powder, salt until the flour mixture disappears. Don't overmix your dough. Then using a large cookie scooper (4tbsp/1/4cup) scoop out 7 equally sized cookie dough balls, and place them on the prepared baking sheet and gently flatten them to about ¾ inch in thickness.
Bake the cookies in the oven for 11 minutes, then let them cool down on the baking sheet for 10-15 minutes before transferring to a cooling rack to cool down fully.
Once fully cooled down, top with a generous amount of lemon curd, spread it all around, dust some powdered sugar on top and enjoy