Not anymore. I just checked, a hamburger happy meal at the McD's nearest to my house (i.e. not an abnormally expensive location such as an airport) is $4.49. Extra $0.20 to add cheese. This is for a 1/10 lb hamburger (!). As others have pointed out, I think it's very possible to acquire the ingredients for this for less than that, assuming you can buy enough for 3-4 at once.