Score your fudge (you and use a knife or clean, unflavoured dental floss). A good size is 1 to 1-1/2 inches square, but perfection isn't necessary. Cut all the slices in one direction, then the other. Use your thinnest knife after running hot water over the blade. A pizza wheel sprayed with nonstick cooking oil works for fudge up to 3/4 inch thick.