1/2 cup (1 stick) unsalted butter, melted
1 cup granulated sugar
1 tsp pure vanilla extract
1/3 cup Dutch-process cocoa powder
1/2 cup all-purpose flour
1/2 cup semi-sweet chocolate chips
1/4 tsp fine sea salt
1/2 cup (1 stick) unsalted butter, softened
1/2 cup packed light brown sugar
1/4 cup granulated sugar
1 1/4 cups all-purpose flour
1/2 tsp baking soda
1/2 tsp fine sea salt
3/4 cup semi-sweet chocolate chips
1 tsp kosher salt