Preheat Oven to 375°F
Mix Together Flour, Cornstarch, Baking Powder, and Salt in Separate Bowl
Add Butter, Granulated Sugar, and Brown Sugar to Stand Mixer Fitted with Paddle Attachment and Mix on Medium until Combined
Add Vanilla Extract and Egg until just combined.
Start Adding Flour Mixture to Stand Mixer on low until combined, the dough mixture should clean the sides of the bowl. This consistency is perfect!
Add Mini Chocolate Chips and pulse mixer until combined.
Roll Out Dough Using Cornstarch or between Parchment to keep dough from sticking to rolling pin or counter.
Cut out Number Shape with Template and freeze on a Parchment Lined baking sheet for 10 minutes
Bake on Middle Rack Until Edges Start to brown, this time depends on cookie thickness!