What is the shelf life of a cake mix with no use by date?
Most boxed cake mixes have a shelf life of one to three years.
It'll be a disaster. If the mix has gone beyond the recommended date, it'll probably explode in your oven. If it doesn't do that, when you eat it you will slowly turn into a cake yourself. You'll notice your fingers at first, but then your whole body will be cake. Then you will start to crumble and die, and dogs will eat all your crumbs.
White cake mix is white in color, while yellow cake mix is yellow in color, to begin with the obvious. White cake mix is often also made with only egg whites, and tends to be lighter and fluffier in feel and milder and sweeter in taste. Yellow cake is often vanilla flavored and a typical cake mix commonly used.
White cake mix cannot be substituted directly for angel food cake mix. The two products have different ingredients that produce different types of cakes. However, if it is only important to have a white cake, and an angel food cake is not specifically required, then you could bake a white cake with a white cake mix instead of trying to make an angel food cake.