Layer the four piadinas on top of each other so that you can cut four discs together, obtaining many squares of the same size.

Place the squares on a baking sheet previously lined with parchment paper. Pour the melted butter over the squares and mix with your hands to evenly coat them.

Bake in a convection oven for 15 minutes at 175°C.

Once baked, while still warm, sprinkle a mixture of sugar and cinnamon over the squares.

Allow them to cool, then serve in a cereal bowl, pouring milk over the top.