In a large bowl cream butter and sugars with a whisk.
Add egg and vanilla, mix till well incorporated.
Sift in all dry ingredients. Mix gently till all ingredients well incorporated.
Gently fold in chopped dark chocolate.
Cover the bowl with a plastic wrap and refrigerate atleast for 1 hour( max 24 hours).
After one hour preheat the oven to 180℃(350℉).
Line baking tray with baking/parchment paper.
Divide the dough into 6 equal parts (approx 80 g each).
Place on baking tray with little distance between them.
Bake for 15 minutes at 180℃(350℉).
After 15 minutes remove from the oven and let it cool completely before moving to an airtight container.
