Preheat the oven to 180°C (350°F).
In a large-size bowl, add all the dry ingredients and half of the chocolate bits and mix until combined.
Add the wet ingredients to the bowl and mix until the mixture forms a soft dough and can be pinched between two fingers and stays together. Add more milk if necessary.
Line a baking tray. Roll the cookie dough into balls and flatten on the baking tray. Press the remaining chocolate bits into the surface of the cookies.
Bake the cookies for 12-18 minutes or until the edges are crisp. If you bake your cookies for a shorter amount of time, they will be crisp on the outside and like a brownie on the inside. If you bake your cookies for a longer time, they will be crisp all of the way through.
Enjoy cookies immediately. Alternatively, store in an airtight container at room temperature for up to 5 days, in the fridge for up to 1 week or in the freezer for up to 1 month.