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My newest go-to cake, Fudge Frosted Chocolate Olive Oil Sheet Cake. A delicious fudgy chocolate sheet cake that surprises everyone. Picture a flavorful, light, and fluffy chocolate sheet cake with rich chocolate flavor. Then add the most delectable, roll your eyes back good, chocolate fudge frosting that’s sweet and fudgy. This cake is made without additional added sugar, is super easy, extra chocolatey, and every last bite is truly delicious!

Fudge Frosted Chocolate Olive Oil Sheet Cake | halfbakedharvest.com

Welcoming in September with cake! As some of you know, Asher’s birthday was this week. And every year I always share a new dessert with her birthday in mind. 

This year it’s a classic chocolate cake, but updated in surprisingly delicious ways!

Fudge Frosted Chocolate Olive Oil Sheet Cake | halfbakedharvest.com

I’ve been excited to share this cake all week. It’s such a special recipe that I know will become a go-to whenever I need a birthday cake!! We all love this. 

The thing you should know about Asher is that while she has a sweet tooth, she’ll only indulge in chocolate. She’s not a fruit dessert girl, she’s just like my mom. 

So of course, her birthday cake needed to be chocolate!! 

Fudge Frosted Chocolate Olive Oil Sheet Cake | halfbakedharvest.com

Here are the details 

I wanted this cake to feel very classic and just like the chocolate cake we grew up eating, but with more flavor and richness. 

I knew a good olive oil would be perfect for adding a sweetness and fruitiness that sets this cake apart. You don’t know it’s there while eating bite after bite, but it makes the chocolate stand out. 

Fudge Frosted Chocolate Olive Oil Sheet Cake | halfbakedharvest.com

Start with the cake. Mix the oil with the wet ingredients. Add maple to sweeten the cake. Then, mix in the dry ingredients. It’s a very basic process. 

Bake the cake in a rectangular baker for simplicity and ease. 

For the frosting. I made a rich fudge-like chocolate frosting, it’s old-school delicious. Chocolate melted together with cream and honey for smoothness. There’s plenty of pure vanilla mixed in. And then a key ingredient is stirred in at the end – sour cream. 

Fudge Frosted Chocolate Olive Oil Sheet Cake | halfbakedharvest.com

Now, this certainly IS just like the old-school frosting everyone LOVES. Very creamy, rich, and fudgy. And I love that it’s not too sweet, but just sweet enough.

To finish, I topped my cake with chocolate curls and sea salt for a salty-sweet finish. And that’s it. Each bite is filled with sweet moist cake and fudgy chocolate frosting.

Best kind of any-day cake to bake, no reason required – though it is fun for a fall birthday. I was so excited when Asher LOVED every last bite of this cake. My parents and Asher even flew with the cake to California to celebrate with my brothers!

Fudge Frosted Chocolate Olive Oil Sheet Cake | halfbakedharvest.com

Looking for easy old-school-style desserts? Here are a few ideas: 

Crinkle Top Brownies

Chocolate Peanut Butter Pretzel Blondies

Giant Salted Espresso Hot Fudge Cookies

Lunchroom Chocolate Peanut Butter Bars

Retro-Style Chocolate Sheet Cake

Lastly, if you make this Fudge Frosted Chocolate Olive Oil Sheet Cake, be sure to leave a comment and/or give this recipe a rating! Above all, I love to hear from you guys and always do my best to respond to each and every comment. And of course, if you do make this recipe, don’t forget to tag me on Instagram! Looking through the photos of recipes you all have made is my favorite!

Fudge Frosted Chocolate Olive Oil Sheet Cake

Prep Time 25 minutes
Cook Time 30 minutes
Total Time 55 minutes
Servings: 12
Calories Per Serving: 440 kcal

Nutritional information is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.

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Ingredients

Frosting

Instructions

  • 1. Preheat oven to 350° F.  Line a 9×13 inch baking dish with parchment paper.
    2. In a large bowl, beat together the olive oil, milk, maple syrup, eggs, and vanilla. Add the flour, almond flour, cocoa powder, baking soda, and salt. Mix until just combined, then slowly beat in the coffee until combined. It will be thin. If using, stir in mini-chocolate chips.
    3. Pour the batter into the prepared pan. Bake 25-30 minutes, until the top is just set and no longer wiggly in the center. Remove and let cool completely before frosting
    4. To make the frosting. In a bowl, microwave the chocolate, cream, honey, cocoa powder, and a pinch of salt, stirring every 45 seconds, until melted. Stir in the butter, then the sour cream. Swirl the frosting onto the top of the cake. Decorate as desired! Slice and enjoy!

Notes

Storing: this cake will keep well for 3-4 days at room temperature or in the fridge. 
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Fudge Frosted Chocolate Olive Oil Sheet Cake | halfbakedharvest.com

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Comments

  1. 4 stars
    The cake was chocolatey and very good. The cake itself was strange because it was so thin making it not very visually appealing. I took it to a dinner at a friend”s house so I was hoping for something a bit more eye popping. Maybe a smaller 8×11 pan would make the cake a bit higher.

    1. Hi Nancy,
      Happy Sunday!🌾🌽 I love to hear that this recipe was enjoyed, thanks so much for making it and sharing your feedback! xx

    1. Hi Macy,
      So sorry, I would not recommend making this as a layer cake! Let me know if you give the recipe a try, I hope you love it! xx

    2. One option for icing – I used a bar of raspberry dark chocolate and gave a hint of raspberry to the cake. Such a great cake!

  2. We love the frosting so much we made extra and piled extra frosting cake on each piece of cake. The extra frosting left over we used in a oatmeal chocolate chip cookie bar recipe, putting a layer of the fudge frosting in between 2 layers of dough!!

    This recipe is awesome and the frosting is magical!

    1. Hey Renee,
      Wonderful!! I love to hear that this recipe was a winner, thanks so much for making it and sharing your review! xT

  3. So yummy! My icing was pretty runny, but whisking a couple of sifted teaspoons of arrowroot powder into the runny frosting made it super thick in no time!

    1. Hey there,
      Happy Wednesday! Thanks so much for giving this recipe a try, I am thrilled to hear that it was a winner! xTieghan

    1. Finished making the cake and frosting. It smells so goooood.
      I want to the frosting on but it came runny. Not sure why. I do not have arrow root to thicken any suggestions?

  4. 5 stars
    Rich and moist and a great tasting gluten free option. And as an added bonus, so easy to make! Made it for a birthday Cake and it received lots of compliments. Will definitely Make again.

      1. One posted that it was a gluten free option. Did she substitute the 1 1/2 cups flour? My 3 year old granddaughter has celiac disease. Always looking for “good” alternatives.

  5. I made this cake for a family birthday party and it was delicious. Everybody loved it. The cake was moist and the frosting was rich and ganache-like. I am not sure why some reviewers did not like this cake. I will definitely make it again.

    1. Hi Terena,
      Perfect!! I appreciate you making this recipe and sharing your feedback, I love to hear that it was enjoyed! xTieghan