Thaw your puff pastry sheets on the bench until pliable.
Preheat your waffle maker.
Depending on the size of your waffle maker, trim the puff to fit. I trimmed mine into 10x11cm rectangles and got 4 rectangles per puff pastry sheet.
Place the first 2 puff sheets onto your waffle maker, top each sheet with a tablespoon of Nutella, place the second 2 sheets of puff on top and close the waffle maker. You are essentially making toasted sandwiches, but with pastry, and in a waffle iron!
Allow the croffles to cook until golden and crispy, it took my waffle maker 5 minutes.
Repeat the process with your remaining puff rectangles and Nutella, until you have 4 waffle sandwiches.
Eat piping hot and enjoy!