Cookie Dough Preparation

1. In a bowl, whisk together the all purpose flour, almond flour, baking powder, and salt.
2. In another bowl, beat the softened butter and sugar until fluffy.
3. Add the egg, vanilla extract, and lemon zest to the butter mixture and mix well.
4. Gradually mix in the dry ingredients until the dough comes together.
5. Divide the dough into two discs, wrap in plastic, and chill for 1 to 2 hours (or overnight).

Rolling and Cutting

1. Preheat the oven to 350°F (175°C) and line baking sheets with parchment paper.
2. On a floured surface, roll out each disc of dough to about 1/4 inch thick.
3. Cut half of the cookies into solid shapes and the other half with a center cut-out.
4. Transfer cookies to the baking sheet using a thin spatula.

Baking

1. Bake the cookies in the preheated oven for 9 to 12 minutes, until the edges are light golden.
2. Allow them to cool on the tray for a few minutes, then transfer to a cooling rack.

Assembling Cookies

1. Once completely cool, dust the tops of the cut-out cookies with powdered sugar.
2. Spread a small amount of lemon curd or jam on the solid base cookies.
3. Gently press the powdered sugar tops onto the filled cookies.