All you have to do is to mix it all up with a spoon! You do not even have to sift the flour, unless of course, it is really clumpy!
The most tricky part here, which is in actuality still pretty simple, is the incorporation of cream cheese. Simply take a chunk of measured cream cheese and pinch small portions into the batter! Here is an attached picture of how I did it, although it does not look really glamorous!
My mantra here is that so long the picture helps you understand better, it should be here!