Mix granulated sugar, cream of tartar, and water in a saucepan. Boil in a saucepan over medium-high heat. If you have a candy thermometer, boil until it reaches 112 °C (235 °F) or until syrup consistency.
Whisk egg whites at low speed for 30 seconds, then increase to medium speed until doubled in size and soft peaks form (about 3 minutes).
Slowly pour the syrup into the egg whites while whisking at high speed until firm peaks form (about 5 minutes).
Add vanilla extract and powdered sugar, whisk until combined and meringue is at room temperature.
If crust forms, add a few drops of lime juice and mix gently with a spatula.
Pipe onto cakes or desserts and enjoy!