01 -
Beat butter, sugars, and cinnamon until light and fluffy, then stir in vanilla.
02 -
Whisk flours, cornstarch, and salt, then gradually mix into butter mixture.
03 -
Form dough into 2 discs, wrap in plastic, and refrigerate 30 minutes.
04 -
Heat oven to 350°F and line baking sheets with parchment.
05 -
Roll dough 1/8 inch thick, cut circles, and make cutouts in half the cookies.
06 -
Cook 9-10 minutes until edges are light golden brown.
07 -
Dust cutout tops with powdered sugar, spread jam on bottom cookies, and sandwich together.