Preheat your oven to 190°C (375ºF) (gas mark 5, 170°Fan) and line a baking tray with parchment paper.
In a mixing bowl, mix butter, light brown sugar and cinnamon together with a spoon until combined.
Unroll the ready-made puff pastry and spread the cinnamon mixture evenly over all the pastry.
Take one end of the pastry (from the longest width) and fold the pastry in half. Gently press the pastry down with your hands.
Using a pizza cutter or knife, cut the pastry into strips. They should be roughly 1.5cm (0.6 inches) in thickness (this will create around 12 to 13 strips).
Pinch the two opposite ends of one strip and twist 3 to 4 times in the opposite direction. Repeat this step for all strips. Watch the video to see how I did this.
Place the twisted strips on the lined baking tray. If you would like a golden-brown finish, spread melted butter over the pastry twists.
Bake in the oven for 17 to 20 minutes or until golden brown.