Chocolate Meringue Cookies

Bahan-bahan (32 porsi)

• 1/2 cup hazelnuts (whole and toasted; or swap toasted pecans or almonds)
• 1/3 cup bittersweet chocolate (finely chopped)
• 1 teaspoon espresso powder
• 1 cup powdered sugar
• 1/4 cup unsweetened cocoa powder
• 4 large egg whites (room temperature)
• 1/4 teaspoon kosher salt
• 1/2 cup granulated sugar
• 1/2 teaspoon pure vanilla extract