- Preheat your oven to 350°F (175°C).
- In a mixing bowl, combine almond flour, coconut flour, powdered sugar, salt, and baking powder.
- Add softened butter, egg yolk, and vanilla extract to the dry ingredients and mix until a dough forms.
- Roll the dough into small balls and place them on a baking sheet lined with parchment paper.
- Use your thumb to create an indentation in the center of each cookie.
- Fill each indentation with lemon curd.
- Bake for 12-15 minutes or until the edges are lightly golden.
- Allow to cool before serving.
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