Preheat the oven to 180°C (356°F).
In a bowl, combine cake flour, sugar, baking powder, and salt.
Add eggs and vanilla extract, then mix into a dough.
Add almonds and mix until evenly combined.
Shape the dough into a long oval and place it on a baking sheet lined with parchment paper.
Bake in the oven at 180°C (356°F) for 25 minutes.
Let it cool, then slice into 1.5 cm thick pieces.
Lay each piece flat on the baking sheet and bake again at 160°C (320°F) for 10-15 minutes.