Susanne Servin of Herzerl Tours has just returned from Vienna and the festive Advent Markets. While Ms. Servin was in Vienna she revisited two great Viennese holiday cookies, Vanillekipferl (vanilla moon/crescent shaped) and Engel Augen (Angel Eyes), in which she has generously shared the recipes with our readers. History and Recipes Vanillekipferl are sugar cookies in the shape of crescents that originated in …