Whisk the flour, brown sugar and baking soda together.
Add the melted butter and knead for 3 minutes on low speed
Add the beaten egg and knead for 2 minutes at low speed (the dough should be well blended).
Add the whole almonds and knead for 30 seconds on low speed.
Shape the dough into a sausage, place it in a plastic film and give it a rectangular shape (or other final size of the cookie).
Put the dough in the freezer for 4 hours.
Cut the frozen dough into thin slices using a slicer, place them on a tray covered with baking paper.
Bake in a hot oven at a temperature of 180°C for 10 minutes.
Let them cool completely before removing them from the baking tray.