Measuring flour by volume versus weight can sometimes cause a discrepency in how baked goods turn out. If the dough is too sticky to roll, you have two options: 1. Add a bit more flour to the dough. This will result in a taller, cakier cookie. 2. Cover the dough and let it sit in the fridge for 20-30 minutes. This will harden the butter to make the dough easier to roll. This will give you a flatter, chewier cookie.