Chocolate Ganache Sheet Cake

Name: Chocolate Ganache Sheet Cake
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Yield: 12 servings
Ingredients: 2 cups all-purpose flour; 2 cups granulated sugar; 3/4 cup unsweetened cocoa powder; 1 1/2 tsp baking powder; 1 1/2 tsp baking soda; 1 tsp salt; 2 large eggs; 1 cup whole milk; 1/2 cup vegetable oil; 2 tsp vanilla extract; 1 cup boiling water; 1 cup heavy cream; 8 oz semi-sweet chocolate, chopped; 2 tbsp unsalted butter

Highlighted under: Dessert Inspirations

Whenever I crave something decadent and chocolatey, this Chocolate Ganache Sheet Cake comes to mind. I love how easy it is to prepare, yet it feels like a special occasion treat. The rich chocolate cake pairs beautifully with the luxurious ganache that sets like a dream. Whether I’m celebrating a birthday or treating myself on the weekend, this cake never fails to impress. Truly, it’s a recipe I return to time and again, and I can’t wait for you to try it too!

Created by

Sienna Brooks

Last updated on 2026-02-16T10:05:37.126Z

Creating this Chocolate Ganache Sheet Cake was one of those delightful afternoons where everything just came together perfectly. I started by mixing simple ingredients but was amazed at how the magic was in the technique—folding the batter gently ensured a fluffy, moist consistency. The ganache was my moment of indulgence, bringing in an extra layer of richness that truly elevates the cake.

Each slice is a celebration of chocolate goodness. I learned that letting the ganache cool slightly before pouring it over the cake results in a shiny, elegant finish that makes it look bakery-worthy. I love serving this cake at gatherings, and it’s always a showstopper!

Why You'll Love This Recipe
Decadent layers of rich chocolate flavor in every bite.
Luxurious ganache that beautifully complements the moist cake.
Easily adaptable for any occasion, from birthdays to casual gatherings.

Ingredients

For the Cake

2 cups all-purpose flour
2 cups granulated sugar
3/4 cup unsweetened cocoa powder
1 1/2 tsp baking powder
1 1/2 tsp baking soda
1 tsp salt
2 large eggs
1 cup whole milk
1/2 cup vegetable oil
2 tsp vanilla extract
1 cup boiling water

For the Ganache

1 cup heavy cream
8 oz semi-sweet chocolate, chopped
2 tbsp unsalted butter

Instructions

Make the Cake

Preheat your oven to 350°F (175°C) and grease a sheet cake pan. In a large mixing bowl, combine the flour, sugar, cocoa powder, baking powder, baking soda, and salt. Mix well. In another bowl, whisk together the eggs, milk, oil, and vanilla. Gradually add this wet mixture to the dry ingredients, mixing until just combined. Lastly, stir in the boiling water until smooth. Pour the batter into the prepared pan and bake for 25 minutes, or until a toothpick inserted in the center comes out clean.

Prepare the Ganache

While the cake is baking, heat the heavy cream in a small saucepan until it just begins to simmer. Pour the hot cream over the chopped chocolate in a bowl and let it sit for a few minutes. Stir until glossy and smooth, then mix in the butter. Allow the ganache to cool slightly until it thickens.

Assemble the Cake

Once the cake has completely cooled, pour the ganache over the top, allowing it to drip down the edges for a beautiful presentation. Let it set for about 30 minutes before slicing. Enjoy your decadent chocolate treat!

Pro Tips

For an extra touch, sprinkle some sea salt on top of the ganache before it sets, or add fresh berries for a pop of color and flavor.

Questions About Recipes

→ Can I make this cake ahead of time?

Absolutely! You can bake the cake a day in advance. Just store it in an airtight container at room temperature until ready to frost.

→ What type of chocolate is best for the ganache?

I recommend using semi-sweet chocolate for a balanced taste, but feel free to experiment with dark chocolate if you prefer a richer flavor.

→ How should I store leftovers?

Store any leftover cake in an airtight container in the fridge. It will stay fresh for up to four days—just allow it to come to room temperature before serving for the best taste.

→ Can I add flavors to the ganache?

Yes! Adding a splash of vanilla extract or a hint of espresso powder can enhance the chocolate flavor beautifully.