Stock is a flavoured liquid preparation. It forms the basis of many dishes, particularly soups and sauces. Making stocks involves simmering animal bones or meat, seafood, or vegetables in water or wine, adding mirepoix or other aromatics for more flavour.
Whoopie pies are like the best parts of a cupcake squished into one delicious sandwich. That would be the top of the cupcake and the frosting, of course.
Pinkie Pie is first introduced as a talented and avid party-thrower. She throws a party for Twilight Sparkle in Friendship is Magic, part 1, a welcome party for Gilda in Griffon the Brush Off, and a birthday party for Gummy in Party of One (and even an after-birthday party the following day).