Peel the mandarins and separate each segment. Lay the segments in a single layer on a lined sheet pan. Freeze until completely frozen (6-12 hours).
Once frozen, add the segments to a food processor and blend until completely smooth and creamy, about 5-8 minutes. You’ll need to stop and scrape the sides a few times.
Store in a freezer proof container. It’s creamiest when just blended making it the ideal time to eat.