5 Tbsp unsalted butter, softened
3 Tbsp brown sugar
3 Tbsp granulated sugar
1 egg
1/2 tsp vanilla extract
1/8 tsp baking powder
1/4 tsp baking soda
1/2 tsp coarse sea salt
1 1/4C all purpose flour
3/4C semi-sweet chocolate chips
1/4C unsalted butter
3oz bittersweet chocolate
3/4C granulated sugar
1 egg
1/2 tsp vanilla extract
1/2 tsp salt
2 Tbsp cocoa
5 Tbsp all purpose flour