Instructions

1. To a medium pot, add sugar and water. Over medium (5) heat, stir until sugar has dissolved.
2. Once dissolved, allow to boil without stirring until syrup reaches 244°F or for ~7 minutes. Brush sides of pot with water to eliminate crystals and turn heat down to medium-low (3), as needed.
3. Once temperature has been reached, remove from heat and set aside. 
4. Add egg whites and cream of tartar to bowl of a stand mixer. Beat with whisk attachment until stiff peaks.
5. Slowly add sugar syrup to egg whites while mixer runs on medium-low speed. Do not scrape bottom of pot.
6. Once fully combined, mix in vanilla. Beat frosting on medium speed for 1-2 minutes until thick and glossy.