Ultimate Double Chocolate Chip Cookies

unsalted butter (2 sticks, melted and cooled)

dark brown sugar (1 cup)

granulated white sugar (1 cup)

instant coffee granules (optional)

sea salt (use only ½ tsp, if you prefer less)

vanilla extract

eggs

baking soda

baking powder (add baking powder if you prefer softer cookies)

AP flour (2 cups measured by spoon and level method)

OR

bread flour + 125 g AP flour (1 cup bread flour + 1 cup AP flour)

dutch cocoa (⅔ cup measured by spoon and level method (I used Callebaut))

chopped semisweet chocolate or white chocolate or a mixture of both (for double or triple chocolate chip cookies)

Extra sea salt flakes (such as maldon or sea salt granules)