Preheat oven to 350 degrees.
Melt together the butter and 1 cup of semisweet chocolate chips over a double boiler. Reserve the remaining ½ cup of chocolate chips for the end. Once melted set aside and let cool to room temperature.
In a large bowl mix together the eggs, sugar, vanilla and coffee.
Then slowly add the chocolate mixture to your bowl.
In a separate bowl combine your flour, coco powder, salt and baking powder. Do not add your flaky sea salt, reserve that to the end.
Slowly add your dry ingredients to your wet ingredients
Once combined mix in your remaining ½ cup of chocolate chips.
Line your 8x8 inch baking dish with parchment paper and then pour your batter in it.
Bake your brownies at 350 degrees for 25- 30 minutes or until your toothpick comes out dry.
When they come out of the oven immediately sprinkle with your flaky sea salt.
Serve warm and enjoy!