Go to Icicle Inn and snowboard down the hill.
Take the right fork when given a chance and go right again when the second fork comes up. You'll land in an area with a cave entrance to the east.
Go north from here and you'll go across a path that takes up two screens to an area on a mountain top that has one branch that goes straight north and two paths to the west.
Go north. You'll be on another path. Cross the first screen but stop when you get to the second. There should be an Added Cut lying in the snow. It's lavender on a white background, so it's hard to spot. You'll only find it if you travelling north on this path, not south.