I've also got some orange, lemon and matcha flavours that I'm planning to try out as well - very excited!
I packaged up the biscuits into little bundles - perfect for Christmas gifts!
Also had some leftover oranges so made another Orange and Poppyseed cake. This is proving to be a hit flavour! I've also figured out that beating the buttercream for a long time gives it an extra lightness that makes it divine. Totally in love with my new KitchenAid Mixer!