This version has a sweet-tart mix of dried cranberries and white and dark chocolate chips, but you can use the base recipe and add your favorite mix-ins. Nuts? Sure! Chopped up candy canes? You bet!

When you want a quick and easy treat, you reach for boxed brownie mix—we get it. And Food Network’s Duff Goldman gets it too. While catching up with the Ace of Cakes star ahead of his trip to this ...