Adding sweetened condensed milk to boxed cake mix can transform an ordinary cake into a richer, sweeter, and more moist dessert.
Its milk solids and sugar create a buttery, slightly caramel-like flavor and a soft, velvety texture.
For best results, replace about ¼ cup of the water with condensed milk instead of adding extra liquid, which can make the cake gummy.
Chocolate, vanilla, and yellow cake mixes work especially well, delivering a delicious upgrade with minimal effort.