In the metal bowl of a stand mixer set over (but not touching) a saucepan of simmering water, whisk together Vanilla Frosting Mix, corn syrup, water, egg whites, cream of Tartar, and salt. Cook over medium heat, stirring frequently, until the sugar has completely dissolved, 3 to 4 minutes.
Attach the bowl to the mixer fitted with the whisk attachment. Beat the mixture on high speed until glossy, thick, and billowing peaks form, about 4-7 minutes. Beat in the vanilla. Use immediately.
© Pamela's Products, Inc.