If you’re feeling motivated, you can also make your own mix from scratch. We recommend this recipe from one of our favorites, Bistro Menil.
PRO TIP There is a lot of debate about glass versus metal pans for brownies. In our extensive testing, we’ve found that light colored metal pans deliver the best results. They conduct heat quickly and evenly, so your brownies will be evenly cooked throughout. Often with glass pans, it takes longer for the center of your brownies to cook. So, by the time the middle of your brownies are cooked through, the edges are already tall and, most likely, getting hard and over- cooked.
NOTE Please note that your box mix might call for oil, melted butter, water or eggs.
MAKE AHEAD The brownies can be stored in an airtight container for up to 2 days.