In a bowl of a stand mixer add the butter, granulated sugar, and brown sugar.
Mix on medium until light and fluffy, about 4 minutes.
Add eggs one at a time to the sugar mixture, with the mixer speed on low until combined.
In a large bowl add cake flour, all-purpose flour, cornstarch, baking soda, and salt, whisk until combined.
Slowly add the dry mix into the sugar mixture, mix on low speed.
Add in the white chocolate chips and cranberries, and pistachios, mix on low until combined.
Place the covered dough in the refrigerator for 3 hours.
Preheat the oven to 410 degrees.
Using a large cookie scoop, create the dough into large balls and lightly press each cookie dough ball to flatten a bit.
Place the dough on the parchment or silicone mat covered baking sheet.
Only place 4-5 on a baking sheet.
Bake for 10 minutes or until golden brown on the top
In a small bowl add the remaining cranberries and pistachios.
In a separate bowl add your simple syrup.
Using a bakers paint brush lightly coat your cookie in the simple syrup.
Sprinkle on the cranberry and pistachio garnish.
Set to the side to dry.