Mix sugars with cold cubed butter until just smooth, do not cream
Add egg yolks, whole egg, and vanilla paste and mexican vanilla, mix until combined
Combine all dry ingredients (flour, baking powder, salt, baking soda, cornstarch)
Add dry ingredients to wet mixture, mixing until just barely combined
Add milk chocolate chips and semi sweet mini chips
Portion dough into 6oz balls (makes 8 cookies)
Freeze overnight
Bake at 350F for 16-20 minutes until golden brown on the outside
Let rest for 20-30 minutes before eating
