Step 1

Preheat oven to 350 degrees F. Heavily grease or parchment line two 9x5 loaf pans or 4 mini loaf pans.

Step 2

In large bowl, combine eggs, sugar, oil, sour cream, grated zucchini, and vanilla. Mix well.

Step 3

In a separate bowl, combine flour, cocoa powder, baking soda and salt. Add to the liquid ingredients and stir to combine. Stir in chocolate chips.

Step 4

Pour batter into prepared pans. Bake in preheated oven for 60-70 minutes for large loaves or 45-50 minutes for mini loaves. Insert a toothpick or cake tester into the middle of a loaf to check for doneness before removing from oven.

Step 5

Remove from pans and allow loaves to cool on wire rack.