Step 1

Preheat oven to 350 degrees. Line a 9x13 inch pan with aluminum foil and lightly spray with cooking spray. This allows for easier removal.

Step 2

In a medium sized bowl add oil, sugar, and vanilla extract in a bowl until combined and crumbly.

Step 3

In another bowl combine flour, cocoa, baking soda and salt. Add the sugar mixture to the flour mixture.

Step 4

Stir the zucchini shreds into the batter until thoroughly incorporated. At this point it may seem very dry and thick. Keep mixing and the zucchini will moisten the batter. Add in the chocolate chips.

Step 5

Spread the batter into the bottom of your 9x13 inch pan. Bake for 25 minutes or until the brownies are fairly firm and begin to pull from the sides of the pan. Allow brownies to cool.

Step 6

Add cocoa powder, powdered sugar and butter to a small bowl and whisk. Add in milk and vanilla and continue to whisk until smooth. Spread over brownies.