Preheat oven to 350 degrees and grease 3 mini loaf pans, 1 large pan, or muffin cups.
In a medium bowl, combine the flour, cocoa powder, brown sugar, salt, and baking soda. Set aside.
In a separate bowl, combine the melted butter, eggs, sour cream, and vanilla.
Pour the wet mixture into the dry mixture and stir until just combined.
Fold in the chips.
Evenly pour the batter (yes, it will be thick) into the prepared pans and place into preheated oven.
Bake for about 30-35 minutes if making mini loaves, 50 minutes if large loaf, and about 25 minutes if muffins.
Remove from oven and allow to cool slightly before removing from pan and enjoying!