One way that people use the expression "You've GOT to ___" is to make enthusiastic recommendations of things.
In the example above, the speaker says that her friend "has got to" try the sauce because it's really good. Here's another example:
You've never been to the Met? Oh my gosh, you've GOT to go there! They have the most amazing exhibits.
This is similar to using "got to" to beg for something: