Roughly blend the not peeled almonds and then mix in a bowl with the butter at room temperature. Add 0 flour, corn flour, grated lemon zest and stir quickly. Then add the seeds of the vanilla pod, ¾ some sugar and mix by hand. Last incorporate the egg yolks and mix everything.
Butter a cake tin, evenly distribute the remaining sugar and cook the sbrisolona in the preheated oven to 180ºC for about fifty minutes.
Cool the cake in the blast chiller with the blast chilling function for about 40 minutes before serving.