Mix butter with sugar and vanilla sugar until frothy. Stir in each egg individually for about half a minute. Mix in flour, almonds, lemon flavor and martini alternately. Fill into a greased loaf pan and bake in a preheated oven at 180 ° C for approx. 45 minutes (chopsticks test).
Let cool and fall out of the mold.
Make a glaze from powdered sugar, martini and lemon juice and cover the cake with it.