There is also no explanation of parchment squares anywhere in this blog — until you need to use them. (foodsofourlives.com)
I freeze all the time, i do use parchment squares or wax squares between each tortilla to make sure they don't stick when just stored in the fridge but if frozen they freeze beautifully without the paper between them. (forkandbeans.com)
Place 1 parchment square on work surface. (epicurious.com)