Claire Saffitz's All-Purpose Meringue - How To Make Meringue

Ingredients

• 6 large egg whites (7.4 oz./210 g.), room temperature
• 1/2 tsp. Diamond Crystal or 1/4 tsp. Morton kosher salt
• 1/8 tsp. cream of tartar or 1/2 tsp. distilled white vinegar
• 1 c. (7 oz./200 g.) granulated sugar
• 1 tsp. pure vanilla extract
• 1 c. (3.8 oz./110 g.) confectioners' sugar