Mix the chocolate cake mix according to packet instructions, substituting orange juice for the water. Toss the chocolate chips with the flour. Fold the chocolate chips and the candied orange peel into the chocolate mixture. Line the muffin pan with the cupcake liners. Fill and bake the cupcakes according to packet instructions. Let the cupcakes cool for one hour on a wire rack before frosting.
To make the frosting: combine all the ingredients except the candied orange peel in a medium bowl. Using a hand mixer, beat until smooth, about two minutes. Using a small spatula, place about one tablespoon of frosting on top of each cupcake. Top with a small sprinkle of candied orange peel.