Super Moist Fudge Brownies (EASY)

1 cup chocolate chips
-1/2 cup (1 stick) butter
-1 cup white sugar
-1/2 cup brown sugar
-3 large eggs
-1/2 cup all-purpose flour (approximately 62 grams)
-1/4 cup cacao powder
-Pinch of salt
-Flaky salt (for topping)
-For Ganache: 1 cup chocolate and 1 cup of heavy cream