Eggnog Sandwich Cookies Recipe

Name: Eggnog Sandwich Cookies Recipe
Ingredients: 2 cups confectioners' sugar, sifted; 16 tablespoons unsalted butter, at room temperature; 2 tablespoons light corn syrup; 2 teaspoons ground cinnamon; 1 teaspoon freshly grated nutmeg; 1 teaspoon vanilla extract; 3/4 teaspoon salt; 1/4 teaspoon ground cloves; 1 large egg, at room temperature; 3 tablespoons rum; 2 teaspoons baking powder; 3 1/2 cups all purpose flour plus more for dusting; sanding sugar, for decorating the cookies; 3 cups confectioners' sugar, sifted; 1/4 cup rum; 1/4 cup heavy cream plus more for thinning