 And you can spruce up your water pie with citrus or coconut or cinnamon. Other unusual Depression-era desserts include vinegar pie. Who wouldn't want to slice that? That'll be tomorrow's breakfast special. My mom used to make the most. How about a slice of wacky cake? Or even tomato soup cake? Why are these making a comeback? Because they give these inflation numbers every month that are as phony as a $3 bill.