How to make
In a deep bowl, beat the butter with the sugar, then add the egg, vanilla and milk.
In another container, add the flour, along with the cocoa, soda and salt and add little by little to the mixture, while continuously beating.
Then add the finely chopped chocolate. After adding the chocolate, knead well with your hands and store the dough for 2 hours in the refrigerator to set.
Line a tray with baking paper and place the shaped balls on it.
When arranging all the cookies, leave a space between them, so that they don't stick together.
Bake the chocolate cookies in a preheated oven at 360°F (180°C) for 10-12 minutes. After removing the cocoa cookies with chocolate from the oven, wait 5 minutes for them to cool.