Place the cocoa and chocolate in a heatproof bowl.
Add the boiling water and cover for 5 mins.
Whisk smooth and cool down.
Once cool, whisk in the sour cream addition.
Meanwhile, in a mixer, beat butter, sugar and vanilla until fluffy.
Add one egg at a time.
Combine the flour, salt and baking soda.
Add the dry ingredients alternating with the chocolate mixture.
Pour half in the pan.
Dollop the cream cheese along the center.
Top with more batter.
You can see my cream cheese is at bottom because I added more than half the batter to begin with. Next time, I will definitely add half so my cream cheese layer is a bit higher.
Bake approx 50 mins or until toothpick comes out almost clean.
A few crumbs on the pick is good!
Cool 10 mins and flip out. I then inverted it again.