Not sure where you would find them in person outside of restaurant supply stores, but if you do a search for 2oz sauce cups, a few places sell them online. (I'm USA based)

Honestly I'm a horrible cook, so I couldn't tell you! I'm personally a big fan of pancakes with a non-syrup wet/moist topping. These came with a dollop of mascarpone and some lemon curd that just hit the spot!

Surprisingly, yes. Filming on location and all the logistics that go along with that can balloon the cost real fast, especially for multiple locations. (Site fees, travel, talent costs, additional security, a separate crew unit, etc) CGI allows you to create different locations through green screen, which majorly cuts down on a lot of the scheduling/logistics. Sometimes green screen will be just a window, other times it will be literally the entire set.