Melt the butter and set aside.
Coarsely crush the almonds, finely chop the candied citron, and set both aside.
Mix the dry ingredients, flour, sugar, baking soda, and salt in a bowl or planetary mixer.
Add melted butter, not too hot, then eggs and liqueur, and mix for 5 minutes until soft and well blended.
Also, add almonds and citron, knead again, wrap in plastic film, and let rest in the refrigerator for several hours: 3 to 5.
Preheat oven to 180C degrees (356F).
Remove the plastic film and dust a clean work surface with flour.
Tear or cut off pieces of dough, forming strands 20-30 cm long, 2 cm wide, and 2 cm high (see photos accompanying the recipe).
Arrange the dough strands on a baking sheet covered with parchment paper and bake in a preheated oven for 25 minutes. They should come out of the oven light, not golden brown.
Remove the baking sheet from the oven and lower the temperature to 100C degrees (212F).
Let the cookies cool for about 10 minutes, then move them gently since they will still be soft. Use a knife to pull them apart (see photo below recipe). Then, cut the strands diagonally, forming cookies about 2 cm long.
Put the pan with the cookies back in the oven and bake for 6 minutes or until the edges are golden brown.
Finally, turn it out from the oven, let it cool, and dust it with powdered sugar.