Preheat oven to 350°F.
Grease four mini Bundt pans. I use 4 - 4 ½ inch pans.
In a medium bowl, whisk together the egg, milk, sour cream, and oil or melted butter.
In a separate medium bowl combine the chopped chocolate chips, baking soda, salt, cocoa powder, and sugar.
Stir the liquid mixture into the dry ingredients until combined.
Divide evenly into each of the greased pans.
Bake for 20 minutes or until toothpick comes out clean.
Loosen the edges with a soft spatula or butter knife and flip upside down onto a plate.
Serve with my homemade hot fudge sauce and berries or whipped cream.