01 -
Mix butter until creamy, then beat with sugar until light and fluffy.
02 -
Mix in egg yolk, vanilla, and peppermint extract until well combined.
03 -
Beat in flour, cornstarch, baking powder, and salt until dough forms.
04 -
Cover and refrigerate for at least 30 minutes.
05 -
Roll into 1 tablespoon balls, place on lined baking sheet, flatten slightly.
06 -
Cook at 350°F for 13-14 minutes until edges are set.
07 -
Let rest 10 minutes on baking sheet, then move to cooling rack.
08 -
Beat butter, sugar, milk, and extracts until creamy.
09 -
Frost cooled cookies and top with crushed candy canes.