Preheat your oven to 350°F (175°C) and grease a round cake pan.
In a microwave-safe bowl, melt the chocolate chips and butter in short intervals, stirring until smooth.
Add sugar, salt, and vanilla extract to the chocolate mixture, stirring well.
Add eggs one at a time, mixing well after each addition.
Add the cocoa powder, mixing until combined.
Pour the batter into the prepared cake pan and bake for about 25-30 minutes until the top is set.
Let it cool before slicing and serving.