I have a small loaf cake that will be a bed and am using a 12" round cake board covered in a woodgrain finish to place it on a 12" round underneath. I want the top board to come off easily for cutting. I cannot get teh parchment paper to stick to the bottom of the woodgrain board. I am trying to overlap the woodgrain a bit over the sides to cover the edges of the parchment but it doesn't help much. Suggestions please?