Step 1 Bring 1-1/2 cups of the cranberry juice to boil in saucepan.
Step 2 Stir into gelatin in large bowl two minutes or until dissolved.
Step 3 Stir in remaining 1-1/2 cups juice and milk. Pour into 13 x 9-inch pan.
Step 4 Freeze 1-1/2 hours or until frozen 1-inch from edges. Spoon into food processor container; cover. Process until smooth. Pour into bowl; cover. Freeze three hours or until firm.