Chocolate Zucchini Sheet Cake

I love chocolate cake, but I love it even more when there are secret vegetable in it, that I can't even taste. If you have never tried Chocolate Zucchini Sheet Cake, you definitely need to try it. It is so moist, and chocolatey. You are going to love this recipe.

For the month of January, we have been trying to post all healthy recipes, and it has been killing me.

I like to eat healthy, but I also need my desserts. All I wanted was chocolate cake this week, and I couldn’t put off my craving any longer.

My family wanted a treat last night, and I wasn’t about to deprive them.

So I took my favorite chocolate sheet cake recipe and adapted it to be a *little* more healthy.  Moderation in all things, right?

It was amazing. It was even better with the zucchini in it. It made it so moist and delicious. You are going to love this recipe.

And I promise you can’t taste the zucchini.

could i use frozen zucchini for this recipe?

Frozen zucchini is convenient, however, for this recipe, we highly discourage it.

The consistency will be a little different and could made your cake soggy or dry, depending on the zucchini.

We recommend using fresh zucchini. Also if there is dripping water, let it drip onto a paper towel, but for the most part, let the zucchini keep it’s moisture.

You don’t need to drain it, or squeeze any of the moisture out.

what is the best way to store this?

If you are making this a day in advance, we recommend placing it in the fridge so it doesn’t dry out, and it stays fresh.

We don’t recommend making it more than a day in advance. It is best when served the day it is made.

If you have leftovers, you don’t necessarily have to refrigerate them, but the frosting will sink into the cake a little bit.

It will still be delicious and moist. I almost prefer the frosting to seep into the cake, because it has a delicious flavor and texture.

But you could also refrigerate it to slow down the frosting from seeping into the cake.

looking for another sheet Cake recipe? Try our pumpkin sheet cake!


have you heard about our restaurant copycat cookbook?

Have you heard about our newest cookbook,Copycat Cooking? We took over 100 of our favorite restaurant recipes and simplified them so that you can make them right at home!

Every recipe has a beautiful mouth-watering photo and has been picky-eater approved. The directions are simple, easy to follow, and do not require any strange ingredients.

Thiscookbook includes copycat recipes from Wingers, Texas Roadhouse, Starbucks, Panera, Cheesecake Factory, Kneaders, and so much more. We have you covered from drinks, to dessert and everything in-between.

We are so excited to share these recipes with you. Order your copy today!
Six Sisters’ Stuff COPYCAT COOKING <—– Click here to order!

have a sweet tooth? We have just the cure. Watch how to make our favorite dessert, here:

Did you know we have a Youtube Channel? We created it just for you. We wanted to show you how simple and delicious our recipes are.

We take you through each recipe, step by step, and show you exactly how to make it. We answer all your questions, and help you get the recipe, perfect, each and every time you make it.

If you are looking for more simple and delicious recipes, head over to our channel and check them out.

We love baking, and one of our favorite things to bake is our, Mom’s Famous Marshmallow Brownies.

Watch how to make our Mom’s Famous Marshmallow Brownies, here:

looking for more dessert recipes? here are a few of our favorite:

Cake Mix Peanut Butter Bars
Take 5 Mini Bites
Caramel Oat Bars
Slow Cooker Peach Cobbler
Chocolate Chip Brownie Cheesecake

Serves: 48

Chocolate Zucchini Sheet Cake

A healthier spin on the classic chocolate sheet cake.

20 minPrep Time

25 minCook Time

45 minTotal Time

Save RecipeSave Recipe


  • 2 cups sugar
  • 1 cup plain greek yogurt
  • 3 eggs
  • 2 1/2 cups all-purpose flour
  • 1/4 cup cocoa powder
  • 1 teaspoon baking soda
  • 1/4 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1/2 cup milk
  • 2 cups shredded fresh zucchini
  • 1 tablespoon vanilla extract
  • Frosting:
  • 1/2 cup (1 stick) butter or margarine
  • 2 tablespoons cocoa powder
  • 1/4 cup milk
  • 3 1/2 cups powdered sugar
  • 1 teaspoon vanilla


  1. Preheat oven to 375 degrees. Spray a 15x10x1" baking pan heavily with non-stick cooking spray.
  2. In a large bowl, cream sugar and yogurt together until smooth. Add eggs, beating after adding each one.
  3. In a separate bowl, sift flour, cocoa powder, baking soda, baking powder, and salt. Mix it in with the sugar/yogurt mixture, while pouring in the milk at the same time. Fold in the zucchini and the vanilla and pour batter into the prepared baking pan. bake for 25 minutes or until a toothpick stuck in the middle of the cake comes out clean.
  4. Before the cake finishes baking, prepare the frosting. In a saucepan, combine the butter, cocoa, and milk. Heat to boiling, stirring frequently. Mix in the powdered sugar and vanilla until the frosting is smooth (you may have to whisk it).
  5. Pour warm frosting over brownies as soon as you take them out of the oven. Let cool.
  6. Cut into 48 bars.



109 cal


2 g


23 g


1 g
Click Here For Full Nutrition, Exchanges, and My Plate Info

Be sure to not miss another recipe!
Follow Six Sisters’ Stuff on Instagram | Facebook | Pinterest | YouTube

Print Friendly, PDF & Email

Comment on this Recipe

9 Responses to “Chocolate Zucchini Sheet Cake”

  1. I made this cake while visiting my mom with zukes I brought from our garden. It was a huge hit! But by the second day most of the frosting had kind of melted I to the cake and the cake got very soggy. Tasted great still, but kind of a strange consistency. Should we have refrigerated the leftovers rather than leaving it at room temp? Or did we do something wrong?
    • Here is the link to see the calorie information for our chocolate zucchini sheet cake. We have our recipes on We will get the nutrition button on our site soon. When we changed our site, we lost a lot of our nutrition buttons. But this site is where the nutrition information comes from. Thanks!

Leave a Comment