01 -
Set oven to 350°F and line a baking tray with parchment paper.
02 -
Melt the butter, then mix in sugar, yolks, vanilla, and green dye until smooth.
03 -
Blend in the flour, baking soda, and salt until dough comes together.
04 -
Roll dough into 12 balls, coat in sugar, and place on the parchment-lined tray.
05 -
Bake for about 10-11 minutes until cracked and spread. Push hearts on top before cooling.
06 -
Rest on the tray for a couple of minutes, then move to a wire rack to finish cooling.