Here I've substituted vanilla skyr for yogurt in a Trixified version of yogurt cake. I also included a splash of Birkir, an Icelandic birch liqueur with a distinctive, almost resin-like taste. It imparted a very subtle "What's that?" kind of quality to my mini cakes - if you can't get your hands on any, substitute a pine liqueur. I used Madagascar vanilla bean in both the cake batter and the frosting, and threw in some coffee extract to give the frosting a little oomph.























