Antartic Slush

Directions

1. 1
   In a blender, mix liqueur, sugar, lemon juice and 1 cup ice.Blend until well mixed.
2. 2
   With blender running, add the rest of the ice, 1/2 cup at a time, until it is all well incorporated.
3. 3
   Transfer to a freezer container and freeze 4 hours or overnight.
4. 4
   To serve, let stand 20 minutes at room tmemperature.
5. 5
   Return to blender and blend until it has a smooth consistency.
6. 6
   Serve into small goblets and serve immediately.
7. 7
   Garnish with mint sprigs, if desired.