Heat together the baking chocolate butter and water until boiling
Remove from heat
Combine the 2 cups sugar and flour
Stir into chocolate mixture
Mix the 2 eggs sour cream salt and baking soda
Add to chocolate mixture Pour chocolate batter into a greased and floured oblong cake pan Spoon cream cheese mixture across top and cut in with a knife to create a marbling effect
Sprinkle top with the chocolate chips Bake at 355 for 25 to 30 minutes