Red Velvet Cake Doctored Cake Mix Recipe My Cake School Spectacular Red Velvet Cake (From a Mix) for the Holidays Family Savvy By adding just a handful of extra ingredients, you'll make this boxed red velvet cake taste like it came from a bakery! My secret ingredients are instant pudding mix and sour Heres how you can fool everyone this holiday season by making a Red Velvet Cake (from a boxed cake mix) that tastes like its homemade. , These are the key ingredients for a bakery quality cake:,