1 12~oz can frozen juice concentrate (orange, apple, pear, grape)
3 envelopes unflavored gelatin
1 1/2 cups (1 juice can) water

Soften gelatin in juice. Boil water and add juice mixture, gradually, stirring until gelatin is dissolved. Remove from heat and pour into a lightly greased 9x13-inch pan. Chill. Cut into squares when firm. Refrigerate.