I’ll be honest, when it comes to brownies, I tend to favor the box mixes, mainly because I haven’t found a homemade recipe that gives you that gorgeous, crackly, shiny crust. King Arthur Flour has cracked the shiny code however, and the secret is chocolate chips.
Source: LifeHacker – Chocolate Chips Are the Secret Ingredient to a Shiny, Crackly Crust for Your Brownies