To plan a perfect outdoor kitchen, you really kind of have to work backwards. You have to choose where the structure is going to go in your backyard... but before you're able to choose the location you have to know how big your kitchen is going to be. Before you know exactly how big it will be, you'll need to know what appliances and features you need to create the perfect outdoor kitchen for you!
So, beginning with the end in mind will help you with planning the size of an outdoor kitchen, then everything else will fall into place pretty easily. For example, all you have to do is: