General Purposes of a Cake Knife
The main reason to own a cake knife is for cutting your wedding cake. However, a cake knife makes it easier to cut and serve cake and pies especially if you purchase one with a built-in spatula. This way you can cut it and serve it with one utensil.
Saving your knife from your wedding day is special but you also want to be able to use it and show it off. Well, you can, by using it to cut your bars, pies, and all the cakes you have at home. Do not leave it hiding in the closet unless you plan to hand it down to your kids and then you should keep it in its box. You can always reserve to use it only during dinner parties to cut and serve cake or pies.