Freeze until ice cream is firm, at least 60 minutes. Repeat this process twice more, then cover with plastic and freeze at least 6 hours. Remove ice cream cake from freezer.

Directions for the melted ice-cream cake: 1. Place a rack in the center of the oven and preheat to 350 degrees. Lightly mist a 12-cup bundt pan with vegetable oil spray, then dust with flour.