Chocolate Cake is one of the desserts you really want to avoid if you're looking after your health and weight. High fat calorie count, high carb count and low protein values make it one of the least optimal meals you can think of, especially if you crave a chocolate cake with tasty cream toppings.
That doesn't mean you have to go without it completely. There are healthy chocolate cake recipes out there, but they usually employ tricks like slimming down serving size and using flour replacements, - and if you crave for that sweet chocolaty goodness, giving it a try is certainly a good idea. Store-bought chocolate cakes are to be avoided at all costs: not only are they rich in calories, but they are usually saturated with ingredients that prolong their shelf life, such as  ingredients you want to avoid if you want to eat healthy.