Snow-Puffed Meringues

Directions

• Place egg whites in a large bowl; let stand at room temperature 30 minutes.
• Preheat oven to 225°. Add vanilla and salt to egg whites; beat on medium speed until foamy. Gradually add sugar, 1 tablespoon at a time, beating on high after each addition until sugar is dissolved. Continue beating until stiff glossy peaks form. Fold in confectioners' sugar.
• Place meringue in a pastry bag fitted with a #1M open star tip. Pipe 1-1/2-in. rosettes onto parchment paper-lined baking sheets.
• Bake until firm to the touch, 45-50 minutes. Turn off oven (do not open oven door); leave meringues in oven 1-1/2 hours. Remove from oven; cool completely on baking sheets.
• Remove meringues from parchment paper. Pipe or spread Nutella onto bottoms of half the cookies; cover with remaining cookies. Store in airtight containers at room temperature.