Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a mixing bowl, cream cold butter, dark brown sugar, and granulated sugar until light and fluffy, about 4 minutes.

Add molasses and egg, mixing for another minute until well combined.

Whisk together flour, baking soda, cornstarch, salt, and spices in a separate bowl, then fold into the wet mixture until just combined.

Gently fold in the chocolate chips until evenly distributed.

Scoop the dough into 4-6 ounce balls and place them on the baking sheet with enough space in between.

Bake for about 8-10 minutes; they should be slightly underbaked in the center but golden brown on the edges.

Allow to cool on the baking sheet for 10-15 minutes before transferring to a wire rack.