In a large bowl add oil, eggs, sugar, vanilla and mix well.
Add mashed bananas, cocoa and sour cream and mix until combined
Add flour, baking soda, salt and all but 2 tbsp chocolate chips. Mix just until flour is combined.
Pour into 9" x5 " loaf pan sprayed with oil. Sprinkle over top 2 remaining tbsp of chocolate chips.
Bake at 350 F for 50 – 60 minutes or just until tester comes out dry.
Let cool then garnish with icing sugar. Enjoy!