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functional image chocolate cake zucchini chocolate buttercream frosting chocolate zucchini cake

Chocolate Zucchini Cake

Heather Wolf
Just when you think chocolate cake couldn't get any better, Chocolate Cake + Zucchini adds another level of deliciousness. Packed with moisture-rich zucchini, this heavenly cake is frosted with a thick layer of chocolate buttercream and bakes up perfectly every time.
5 from 2 votes
Prep Time 20 minutes
Cook Time 45 minutes
Cool 2 hours
Total Time 3 hours 5 minutes
Course Cakes and Cupcakes
Cuisine American
Servings 12 slices

Ingredients
  

Chocolate Cake

  • 2 1/4 cups all-purpose flour unbleached
  • 3/4 cup unsweetened cocoa powder
  • 1 tsp baking soda
  • 1/2 tsp baking powder
  • 1/2 tsp sea salt fine
  • 1 tsp espresso powder
  • 1 cup olive oil
  • 1 cup granulated sugar
  • 3/4 cup light brown sugar packed
  • 4 large eggs room temperature
  • 1/2 cup sour cream room temperature
  • 2 tsp vanilla extract pure
  • 3 cups shredded zucchini
  • 1 cup chocolate chips

Chocolate Frosting

  • 1 1/2 cups unsalted butter room temperature
  • 3 1/2 cups powdered sugar
  • 3/4 cup unsweetened cocoa powder
  • 2 tsp vanilla extract pure
  • 1/4 cup heavy cream room temperature
  • 1/8 tsp sea salt fine
  • 1/4 cup chopped chocolate

Instructions
 

Chocolate Cake

  • Preheat oven to 350 degrees. Coat a 9 x 13 metal baking pan with nonstick spray. Set aside.
  • In a large mixing bowl, sift together dry ingredients: flour, cocoa powder, baking soda. baking powder, salt and espresso powder. Set aside.
  • In a separate bowl, use an electric mixer to beat together oil and both sugars.
  • Add eggs, one at a time, beating after each addition until well incorporated.
  • Beat in sour cream, vanilla and grated zucchini until combined.
  • Gradually add dry ingredients to wet, beating on medium speed until just combined. Do not overmix.
  • Add chocolate chips, stirring with a wooden spoon until evenly distributed.
  • Pour batter into prepared baking pan and bake for 45 minutes. Cake is done when a tester inserted into the center comes out clean.
  • Place baking pan on a wire rack to cool completely, approximately 2 hours, before frosting with chocolate buttercream.

Chocolate Frosting

  • Beat butter with an electric mixer on medium speed until creamy and smooth, approximately 2 minutes. Scrape down the sides of the bowl with a spatula as needed.
  • Add powdered sugar, cocoa powder, vanilla, heavy cream and salt beating on low until incorporated then increase speed to high and beat until fluffy, approximately 2 minutes.

Assembly and Storage

  • Frost cake with buttercream then top with chopped chocolate if desired.
  • For pristine slices, clean knife blade with hot water in between cuts.
  • Cake will keep covered at room temperature up to 3 days or refrigerated up to 5 days.
Keyword cake, chocolate, zucchini