1/4 c. skim milk
1/2 tsp. unflavored gelatin
1/4 c. cold water
2/3 c. nonfat dry milk
2 tsp. sugar
1 tsp. vanilla

Pour milk into a metal mixing bowl. Place into freezer along with beaters. Let stand until milk becomes slushy, 30 to 45 minutes. In saucepan, sprinkle gelatin over cold water and let stand 3 minutes or until gelatin is softened. Place over low heat and cook until gelatin dissolves. Cool. Remove skim milk and beaters from freezer. Add gelatin and remaining ingredients. Beat at high speed until it forms soft peaks. Cover bowl and chill at least 20 minutes before serving.