Prepare ingredients: melt dark chocolate using a double boiler, bring eggs to room temperature, and sift dry ingredients (cake flour, cocoa powder, baking soda, baking powder, salt).

Mix butter and brown sugar until smooth and creamy.

Gradually add eggs in 2–3 portions, mixing well after each addition.

Add melted dark chocolate to the mixture and combine thoroughly.

Combine the liquid mixture with the sifted dry ingredients to form the dough.

Shape the dough into cookie portions directly without refrigeration, as the dough is naturally sticky.