Wait a sec......
Do we know that Walt has given Jesse and/or Todd exactly everything in the blue meth recipe? Apparently Todd doesn’t know the whole recipe. Does Jesse?
When Jesse accompanied Gus and Mike to Mexico to meet with the cartel boys, Gus had Jesse do a cook that came in at 98% pure.
Yeah, he knows how to do it.
It appears to be more of a knowledge and attention to detail issue than ingredients. Walt knows the variables and understands the reactions such that he can compensate.