Good-Cooking - Maple-Iced Angel Food Cake

Ingredients

• 1 1/2 cups egg white (from about 12 eggs), at room temperature
• 1 1/4 teaspoons cream of tartar
• 1/2 teaspoon salt
• 1 1/4 cups granulated sugar
• 1 1/8 cups sifted cake flour
• 1 teaspoon pure vanilla extract
• 3 tablespoons pure maple syrup
• 1/4 cup pure maple syrup
• 1 tablespoon egg white
• 1 1/2 cups confectioners' sugar