This is not a terrible episode, but it is definitely nowhere near a 9/10. Rachel's subplot is the weakest part of this episode. It makes absolutely no sense, it is straining logic beyond the breaking point and is not funny at all. Not only is she, apparently, so disconnected from reality that she does not realize the impossibility of her "recipe", but for some reason, that is never explained, she is the only one not to try her dessert? I get that it is OK for sitcom plots to be silly, but when they are as stupid as this one, they just can't be funny.
The other subplots are OK, with the one about Ross getting high and then blaming Chandler being the best one.
The other subplots are OK, with the one about Ross getting high and then blaming Chandler being the best one.