A 12-inch cast-iron skillet can handle just about any meal, from breakfast to dessert—and brownies are no exception. The best ones have crispy, chewy edges and rich, fudgy middles.
A combination of Dutch-processed cocoa powder and unsweetened chocolate created complexity, and a little vanilla added more depth. To achieve that perfect fudginess, we took inspiration from fudge. Many fudge recipes call for marshmallows or a marshmallow product. By simply melting some marshmallows along with the cocoa powder mixture, we created a super-fudgy batter.