Chill a small mixing bowl. Soften gelatin with 2 teaspoons cold water, then add boiling water, stirring until gelatin is completely dissolved. Cool until tepid. Place ice water and nonfat dry milk in the chilled bowl. Beat at high speed until the mixture forms stiff peaks. Add sugar, still beating, then oil and gelatin. Place in freezer about 15 minutes, then transfer to refrigerator until ready for use. Stir before using to retain creamy texture. Makes 2 cups.