Chocolate Muffins

AT A GLANCE PREP:10- 15 mins. BAKE: 20 mins. to 25 mins. For this recipe you will need:  2/3 cup Dutch-process cocoa 2 cups King Arthur Unbleached All-Purpose Flour 1 1/4 cups light brown sugar 1 teaspoon baking powder 3/4 teaspoon espresso powder, optional 1 teaspoon baking soda 3/4 teaspoon salt 1 cup chocolate chips…