Preheat oven to 355° degrees.
With a rolling pin, flatten the puff pastry as much as you can. You can work with one sheet at a time.
Brush the melted butter onto the puff pastry sheets.
Cut each puff pastry sheet into two pieces lengthwise.
Roll each piece to create a tightrope type of form. Cut about 25% of the rope and attach to the other 25% of the rope to create the 3rd wheel that is rendered by one pastry puff box. It will be a smaller popover.
Take each rope and roll into a wheel.
Use some of the melted butter to brush each hole in a 12 hole muffin tin or popover pan.
Place each wheel in the muffin tin.
Bake for 35 to 40 minutes or until the popover is golden and baked through.
While they bake, place brown sugar and cinnamon in a bowl and mix well.
Once the popovers are done, quickly cover in the sugar, cinnamon mixture and place on your serving dish.
And that's it! Enjoy!