Точно без белка. Ниже дам ссылку на источник.  Сироп, как я понимаю, для текстуры и блеска. Сироп предотвращает сахар от формирования кристаллов.Easy Orange Frosting: 1 cup powdered sugar Finely grated zest of 1 orange 1 to 2 tablespoons freshly squeezed orange juice 1/2 teaspoon orange liqueur 1/4 teaspoon light corn syrup In a medium bowl add all of the ingredients and whisk together to combine. If too thick in consistency, add a touch more orange juice or water to thin out. Use a pastry bag fitted with a star tip to pipe the frosting between 2 of the gingerbread cookies. Press the 2 cookies halves gently together. http://www.foodnetwork.com/recipes/alexandra-guarnaschelli/gingerbread-cookies-for-the-holidays-recipe/index.html