A joke goes like this: A friend at work had an unusual dental related problem recently. About a month ago he had to have a small steel plate inserted in his mouth. A week later he noticed the plate was starting to rust. The dentist asked him if he had a change in his eating or drinking habits that may have caused the problem. My friend explained that he had tried hollandaise sauce for the first time recently and liked it so much he put it on everything. The dentist advised that the solution was to remove the steel plate and replace it with a chrome plate. When my friend asked why chrome the dentist replied, "There is no plate like chrome for the hollandaise!"
What does the punch line mean, and why is it funny?