Place the butter and brown sugar in a bowl and mix until creamy.
Then add the soy/vegetable milk with the vanilla and mix further.
In another bowl, add the flour, baking soda, baking powder, cornflour and salt and mix everything together.
Add the dry ingredients to the wet ingredients and mix into a thick dough. I did it with the mixer out of laziness, but it can very well be done by hand.
Add the chocolate chips or coarsely chopped chocolate and mix to make sure everything is covered.
Preheat the oven to 180 degrees.
Line one or two baking trays with baking paper and roll the dough into balls with wet hands. Depending on the size of the balls, you get between 10 and 30 cookies. Do not place the balls too close together as the cookies will stick together.
Place the baking sheet in the oven and bake for about 12 minutes. It's best to stay with it for a while. When the edges are baked and it is lightly browned on top of the cookies, they are ready.
Let them cool on the plate and then on a rack. You can store them in a sealed container for up to a week. But they probably won't make it to the end of the week.
Have fun baking!