Can of 7 Up with ice.
FOOD NEWS
The Science Behind The Wonderful Texture Of 7UP Cake
By Cristine Struble
Thanks to the scientific properties of 7UP, baking a nostalgic soda cake only requires the box mix of your choice and your favorite carbonated beverage.
Carbonated beverages make cake batter light and fluffy, as incorporating an acidic, carbonated beverage with leavening agents makes the carbon dioxide bubbles more pronounced.
Although the texture of any soda cake will be altered due to fewer ingredients, it will still rise. Any soda can have a similar effect, but 7UP creates a slightly different result.
Southern Living believes that 7UP's carbonation level is a reason, while others assume that the acid levels have an impact.