Heat the oven to 180 ° C. Place a baking sheet in a 20×30 cm tray.
Melt natural chocolate and butter in a water bath. Stir frequently until chocolate melts. Leave aside to cool for a few minutes. 3. Blend the eggs with sugar. 4. Mix them with the chocolate mixture. Add cinnamon, salt, flour and chocolate chips.
Place the mixture in the pan and level with a spatula or spoon.