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the best buttercream chocolate frosting
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5 from 3 votes

Chocolate Zucchini Cake Recipe

The chocolate cake with hidden veggies!
Prep Time30 mins
Cook Time30 mins
Total Time1 hr
Course: Dessert
Cuisine: American
Keyword: chocolate and zucchini cake recipe, chocolate sheet cake recipe, frosted sheet cake recipe
Servings: 16
Calories: 548kcal
Author: Eden

Ingredients

Chocolate Zucchini Cake Recipe

  • 2 1/2 cups shredded / grated zucchini
  • 1/2 cup butter, room temperature
  • 3/4 cup vegetable oil
  • 2 large eggs
  • 2 cups sugar
  • 3/4 cup unsweetened cocoa powder (like Hershey's)
  • 1 1/2 teaspoons vanilla extract
  • 1 teaspoon baking soda
  • 1/2 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1/2 cup sour cream
  • 1 shot espresso (or 1 tablespoon espresso powder)
  • 2 cups all-purpose flour
  • 1/2 cup milk chocolate chips

Chocolate Buttercream Frosting

  • 16 tablespoons butter, softened
  • 2 1/2 cups confectioners sugar
  • 3/4 cup cocoa powder
  • 1/3 cup whole milk
  • 1 1/2 teaspoons vanilla
  • 1 tablespoon brewed coffee

Instructions

Chocolate Zucchini Cake Recipe

  • Beat the butter, sugar and oil on high until fully mixed
  • Add in eggs one at a time and mix until combined
  • Add in sour cream and mix
  • Add in baking powder, baking soda, vanilla extract, espresso and salt
  • Sift together flour, cocoa powder and beat on low until incorporated
  • Stir in shredded zucchini and chocolate chips
  • Pour into a sheet pan and bake at 350 degrees for 30 minutes
  • Let it cool before frosting

Chocolate Buttercream Frosting

  • In an electric mixer, with the paddle attachment, whip the butter and sugar and cocoa powder together until light and fluffy
  • Add in the vanilla and espresso and continue whipping
  • Slowly add in the whole milk until fully whipped
  • Whip on high for a few minutes until light and fluffy

Nutrition

Calories: 548kcal | Carbohydrates: 66g | Protein: 5g | Fat: 32g | Saturated Fat: 22g | Cholesterol: 77mg | Sodium: 320mg | Potassium: 279mg | Fiber: 4g | Sugar: 49g | Vitamin A: 705IU | Vitamin C: 6.7mg | Calcium: 53mg | Iron: 2.2mg