Preheat oven to 350 degrees and line two cookie sheets with parchment paper or silicone baking mat.
Using a standing mixer, beat the brown sugar, butter, eggs and vanilla until combined, smooth and fluffy.
Using a small bowl, whisk the flour, cornstarch, baking powder, and salt until combined.
Gradually beat in the flour into the wet until a dough has formed.
Fold in the mini chocolate chips and the crushed cookies.
Using a medium ice cream scooper, scoop out some cookie dough and roll into a ball.
Bake the cookies for 13-16 minutes or until a light golden brown.
Remove and allow to cool completely.