Start by preheating your oven to 350 degrees and lining your baking sheet with parchment paper.
Grab your thawed puff pastry and lay it out flat on wax paper or parchment paper that it came rolled up in.
Next, using a pizza cutter or knife, divide your dough is half.
Then take each half and divide them into three triangular portions. The two triangles in the middle will be larger than the others, so cut those in half lengthwise for a total of 8 triangular dough pieces.
Mix your softened butter, cinnamon, and sugar in small bowl and spread the mixture on each triangular piece of dough.
Now, starting at the widest end of your triangle piece begin to roll it up into the shape of a croissant.
Place your rolled up dough on the parchment paper lined baking sheet, spaced a few inches apart.
Bake at 350 degrees for 15-20 minutes.