For a truly fudgy consistency, don’t overbake the brownies; as soon as a toothpick inserted into the center comes out with sticky crumbs attached, the brownies are done. If the toothpick emerges with no crumbs, the brownies will be cakey.

serves 16
You might need to buy:
  • all-purpose flour
  • Dutch-processed cocoa powder
  • baking powder
  • salt
  • unsalted butter
  • low-fat sour cream
  • chocolate syrup
  • vanilla extract
  • large egg plus
  • large egg white
  • sugar