Italian Meringue (Magnificent Pie Meringue)

Combine 340 g sugar and 21 g corn syrup in a heavy-bottomed saucepan.

Heat sugar mixture over medium-high heat, stirring gently, until it reaches 240°F (soft-ball stage), about 7–10 minutes.

While syrup cooks, whip 6 egg whites and 5 g cream of tartar in a clean bowl until stiff peaks form.