01 -
Stir together salt, flour, baking soda, and baking powder.
02 -
Whip together butter, lemon zest, and sugar until light and fluffy.
03 -
Blend the egg yolk and egg into the mixture until combined.
04 -
Pour in vanilla and lemon juice, then mix well.
05 -
Slowly mix the dry ingredients into the wet ingredients until just incorporated.
06 -
Put the dough in the fridge to chill for about an hour.
07 -
Set your oven to 350°F (175°C) to preheat.
08 -
Shape dough into 1 1/2 tablespoon balls and space 12 on each baking tray.
09 -
Cook the cookies in the oven for about 9 minutes.
10 -
Let the cookies rest on the tray for 5 minutes, then move them to a cooling rack.
11 -
Mix powdered sugar with lemon juice to make the icing.
12 -
Spread or pipe the icing onto the cookies after they've cooled. Let it set before storing.