Doctored Red Velvet Box Mix Cake

Name: Doctored Red Velvet Box Mix Cake
Prep time: 5 min
Cook time: 30 min
Total time: 35 min
Cuisine: American
Ingredients: 1 box red velvet cake mix (I like Betty Crocker Delights super moist red velvet cake mix, or Duncan Hines. ); 5 ounces all purpose flour (1 cup spooned in and leveled); 7 ounces granulated sugar (1 cup); 6 ounces sour cream, room temperature (or plain greek yogurt - 3/4 cup); 2 Tablespoons cocoa powder; 1/2 tsp salt; 1/2 tsp baking soda; 1 tsp vanilla extract; 2 ounces vegetable oil (1/4 cup); 4 ounces unsalted butter, melted (1/2 cup); 12 ounces buttermilk, room temperature (or regular milk + 1 Tbsp of white vinegar. 1 1/2 cups); 3 large eggs (room temperature); 1 Tablespoon Super Red Food Coloring; 6 ounces pasteurized egg whites; 24 ounces sifted powdered sugar; 2 teaspoons vanilla extract; 1/2 teaspoon salt; 24 ounces unsalted butter (room temperature); 1/8 teaspoon yellow food coloring; 1 teaspoon electric pink food coloring; 2 Tablespoons super red food coloring