In Pennsylvania, the pie of the day is always apple. Why it matters: You can't get any more basic than that for Pi Day. State of play: Apple made up nearly a third of all pie sales last year, per ...

Delicious in their own right, they're a completely different dessert than what we're talking about here, which is really just your tried and true basic apple pie with a note of tart cream added.

I loved Arby's apple-infused croissant-textured pie. However, my favorite was the $3.65 caramel apple empanada from Taco Bell. Year-round, I opt for savory pies. But come fall, I ditch my go-to ...