Preheat oven to 350℉ and line a cookie sheet with parchment paper.
Melt the chocolate chips with the butter over a double boiler or in the microwave, until smooth and blended. *See notes
In a large bowl or stand mixer, beat the sugar and eggs until blended and smooth. stir in the vanilla extract.
On low speed, slowly add the melted chocolate a little at a time. You don't want to cook the eggs by adding the chocolate all at once.
Add the flour and cocoa powder and stir until just combined and smooth. Don't overmix.
Drop the batter on the prepared pan using a scoop or large spoon.
Bake 12-14 minutes or until the edges of cookies are browned and the centres are still soft.
Cool on the pan for 3-4 minutes before transferring to a cooling rack to finish cooling.
Drizzle the caramel sauce over the top of the cookies while they are cooling on the rack. Heat the caramel slightly if it is too thick to drizzle.
Store cookies in an air-tight container for up to 3 days.