In a medium bowl, combine the flour, cornstarch, baking soda, baking powder and salt. Whisk until combined and set aside.
Place your butter in a large microwave safe bowl and melt in 20 second increments until fully melted.
Add your white sugar, brown sugar and orange zest and whisk for 1 minute until well combined.
Add in the egg, orange juice and vanilla extract. Whisk until combined.
Add the flour mixture into the wet mixture and using a spatula, fold until combined. Then add in the chopped pecans and chocoalte chips and fold until combined.
Cover the dough and set in the fridge for a minimum of 2 hours but preferably overnight for a thicker cookie with more orange flavour.
Preheat your oven to 350℉. Line or spray a baking pan.
Scoop heaping 2 tbsp size balls and make sure they are at least 2 inches apart so they don't spread into each other. Bake for 12-13 minutes or until the edges are just starting to turn golden.
Let fully cool before storing in an airtight container for up to 5 days.