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A thick slice of Classic Chocolate Zucchini Cake with dark chocolate buttercream on a white plate.

Classic Chocolate Zucchini Cake


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5 from 20 reviews

  • Author: Jasmine Padda
  • Total Time: 1 hour 5 mins
  • Yield: 12 servings

Description

This rich and indulgent chocolate cake uses finely shredded zucchini to achieve a perfectly moist, fudgy crumb that stays fresh for days. Enhanced with a touch of espresso powder to deepen the cocoa profile, this secret-ingredient dessert delivers bakery-quality results right from your home kitchen.


Ingredients

  • All-purpose flour
  • Natural unsweetened cocoa powder
  • Baking soda
  • Baking powder
  • Salt
  • Espresso powder
  • Vegetable oil
  • Granulated sugar
  • Light brown sugar
  • Large eggs
  • Sour cream
  • Pure vanilla extract
  • Shredded zucchini
  • Semi-sweet chocolate chips
  • Unsalted butter
  • Heavy cream
  • Confectioner’s sugar


Instructions

  1. Prepare pans and oven. Heat oven to 350°F and grease three 8-inch round pans, lining the bottoms with parchment paper.
  2. Combine dry ingredients. Whisk flour, cocoa powder, baking soda, baking powder, salt, and espresso powder in a large bowl.
  3. Mix wet ingredients. Beat oil, sugars, eggs, sour cream, and vanilla extract in a separate large bowl until smooth.
  4. Incorporate the zucchini. Stir the shredded zucchini into the wet mixture until evenly distributed.
  5. Combine and bake. Gently fold dry ingredients into the wet mixture, add chocolate chips, divide into pans, and bake for 30-35 minutes.
  6. Cool the layers. Let cakes cool in pans for 10 minutes before inverting onto a wire rack to cool completely.
  7. Prepare the ganache. Melt chocolate chips with a portion of the heavy cream until glossy, then set aside to cool.
  8. Whip the frosting. Cream butter with salt, then beat in cocoa, confectioner’s sugar, remaining heavy cream, and the cooled ganache until fluffy.
  9. Assemble the cake. Layer the cake rounds with generous amounts of buttercream and apply a smooth finish to the exterior.

Notes

  • Avoid squeezing the water out of the zucchini, as its natural moisture is essential for the cake’s fudgy texture.
  • Use room temperature eggs and sour cream to ensure the batter emulsifies properly for a consistent crumb.
  • Chill the cake layers in the refrigerator for 30 minutes before frosting to make handling easier and prevent crumbling.
  • Always sift cocoa powder and confectioner’s sugar before mixing to avoid tiny lumps in your final buttercream frosting.
  • Prep Time: 30 mins
  • Cook Time: 35 mins
  • Category: Dessert
  • Method: Baking
  • Cuisine: American