There are 2 ways to thaw puff pastry. 1 fast 1 slow. If you can, place it in the fridge for 24 hours to thaw. Or if you are thawing last minute or right before, you can place it on the counter for 30 minutes. You need it to be pliable to roll out but not thawed out to be the point you can't handle it/move it/the butter has melted inside.