Frosting: Put the chocolate chips and shortening in a medium microwavable bowl. Microwave on high, stirring halfway between cooking time, until the chocolate is melted, about 40 to 50 seconds. Stir until smooth. With an electric mixer on low speed, beat the cream cheese in a medium bowl until smooth, about 1 minute. Beat in the melted chocolate, orange juice, vanilla, and salt until blended. With the mixer on low speed, beat in the confectioners’ sugar, 1/2 cup at a time, until smooth, about 2 to 3 minutes. Cover with plastic wrap and set aside.