01 -
In one bowl, mix the baking soda, flour, and baking powder. In another, cream together the butter and sugar before adding the egg and vanilla. Gradually combine the dry mix with the wet.
02 -
Roll the dough into balls and place them in a mini muffin tin. Bake until golden, then press the centers down to create small wells. Let them cool completely.
03 -
Whip the butter and sugar together until smooth. Slowly mix in the eggs and lemon juice. Cook on low heat, stirring constantly, until thickened.
04 -
Spoon the lemon filling into the cooled cookie shells. Chill in the fridge, then decorate with lemon zest and a dusting of powdered sugar.