1 (18.25 ounce) package orange cake mix
¾ cup creamy salad dressing (such as Miracle Whip®)
1 (1.3 ounce) envelope dry whipped topping mix (such as Dream Whip®)
¾ cup freshly squeezed orange juice
3 large eggs
2 tablespoons grated orange zest
1 (13 ounce) jar marshmallow creme
½ cup unsalted butter at room temperature
½ cup vegetable shortening
½ cup unsalted butter at room temperature
½ cup vegetable shortening
¼ cup freshly squeezed orange juice
1 tablespoon orange zest
¼ teaspoon vanilla extract
2 drops orange paste food coloring
or as desired
4 cups confectioners' sugar