Bring a pot of water - large enough to completely submerge the peaches - to boil. Mark a shallow X into the blossomed end of each peach. Cook in boiling water 1-2 minutes. Plunge in cold water and pull away the skins. Cut peaches in half, remove the pits, and then slice. Place peaches and other ingredients in a blender. Pulse until smooth and creamy. Pour into glasses and serve.