I tried every hack I could find for how to make box cake mix better and found the simplest way to make a moist, flavorful, better-than-scratch cake by adding two simple ingredients to any box cake mix! Bottom line, adding ½ cup of sour cream and 2 teaspoons of vanilla extract completely elevates your cake mix! Click on the link in comments for all the hacks I tried and more details on the testing and tasting process! #kitchenhack #boxcakemix #easybaking #birthdaycake | Marley's Menu