Chocolate Sheet Cake With Cocoa

Name: Chocolate Sheet Cake With Cocoa
Prep time: 15 min
Cook time: 30 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 soda; 1 1/2 tsp baking powder; 1 tsp salt; 2 large eggs; 1 cup whole milk; 1/2 cup vegetable oil; 2 tsp vanilla extract; 1 cup boiling water; 1/2 cup unsalted butter, softened; 2/3 cup unsweetened cocoa powder; 3 cups powdered sugar; 1/3 cup milk; 1 tsp vanilla extract

Highlighted under: Classic Collection

I can't get enough of this Chocolate Sheet Cake With Cocoa! It’s a delightful dessert that combines the rich and intense flavor of cocoa with a moist, tender crumb. Whenever I need a crowd-pleaser or a simple cake for family gatherings, this recipe never lets me down. The ease of preparation means I can whip it up on a whim, and the results are always impressive. Plus, the chocolate frosting takes it to the next level, making it an irresistible treat for chocolate lovers like me!

Created by

Loretta Winslow

Last updated on 2026-02-10T17:05:36.355Z

When I first tried making this Chocolate Sheet Cake With Cocoa, I was pleasantly surprised at how simple it was to prepare. I used a high-quality cocoa powder, which intensified the chocolate flavor significantly. The key for me was to not overmix the batter, which maintains the cake's light texture.

I fondly remember the first time I served this cake at a family gathering. Everyone was delighted, and the compliments rolled in! It’s a great beginner recipe, and I love that it uses just one bowl, making cleanup a breeze.

Why You Will Love This Recipe

Rich chocolate flavor that's deeply satisfying
Incredibly moist cake with a tender crumb
Frosting that pairs perfectly for a sweet finish

Mastering the Perfect Chocolate Flavor

The rich chocolate flavor in this cake comes primarily from the unsweetened cocoa powder. It's crucial to use high-quality cocoa for the most intense taste. I recommend opting for Dutch-processed cocoa if you prefer a slightly smoother and less bitter flavor profile. Also, don't skip the step of sifting the dry ingredients together, as it helps to enhance the cake's texture by ensuring that the cocoa is evenly distributed throughout the batter.

In addition to cocoa powder, the sugar in this recipe balances the bitterness, adding sweetness that complements the chocolate. While granulated sugar is standard, you can experiment with brown sugar for a deeper flavor. Just remember that this may slightly alter the texture and moisture, making the cake denser and chewier. Keep an eye on it while baking, as this could affect the baking time slightly.

Texture and Moisture: The Key to Success

Achieving the perfect moist crumb is essential for this cake's success. The combination of milk and oil provides complementary moisture, with the oil helping to create a tender texture. If you're looking for a dairy-free option, you can substitute whole milk with almond or oat milk, and replace the vegetable oil with melted coconut oil. This way, you still get that beautiful moisture and flavor without losing any texture.

Another crucial step in ensuring the cake remains moist is allowing it to cool completely in the pan. If you try to remove it too soon, you risk breaking the cake apart. Once it’s cool, you can gently run a knife around the edges before inverting it onto a wire rack. This will help to preserve its fluffy structure while cooling.

Ingredients

Prepare your ingredients before you start baking for a seamless process.

Cake Ingredients

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

Frosting Ingredients

1/2 cup unsalted butter, softened
2/3 cup unsweetened cocoa powder
3 cups powdered sugar
1/3 cup milk
1 tsp vanilla extract

Make sure all your ingredients are at room temperature for the best results.

Instructions

Follow these steps carefully for a perfect cake.

Preheat and Prepare

Preheat your oven to 350°F (175°C). Grease and flour a 13x18 inch sheet pan.

Mix Dry Ingredients

In a large bowl, sift together flour, sugar, cocoa, baking soda, baking powder, and salt.

Combine with Wet Ingredients

Add eggs, milk, oil, and vanilla to the dry mixture. Beat on medium speed for 2 minutes.

Add Boiling Water

Stir in boiling water (the batter will be thin). Pour into prepared pan.

Bake the Cake

Bake for 30 minutes or until a toothpick inserted comes out clean. Let cool completely.

Prepare Frosting

In a medium bowl, cream butter, then add cocoa. Gradually mix in powdered sugar and milk until smooth.

Frost the Cake

Spread the frosting evenly over the cooled cake. Slice and serve.

Enjoy your delicious Chocolate Sheet Cake with friends and family!

Pro Tips

For extra flavor, consider adding a teaspoon of instant coffee granules to the batter for a richer chocolate taste.

Frosting Insights

The frosting is just as vital as the cake itself. Starting with softened butter is key, as it incorporates better with the cocoa and powdered sugar, resulting in a smoother, more spreadable texture. If your frosting seems too thick, a little extra milk can adjust the consistency to spread easily. Conversely, if it’s too runny, adding a bit more powdered sugar can help achieve that perfect frosting thickness.

When you mix the cocoa for the frosting, ensure it's sifted to avoid any clumps. This isn't just about aesthetics; clumps can create uneven textures in the frosting, which can detract from the overall experience of the cake. Once you've frosted the cake, let it sit for a few minutes before cutting; this allows the frosting to set slightly, making slicing easier.

Serving Suggestions & Variations

Serve this Chocolate Sheet Cake with a scoop of vanilla ice cream or a dollop of whipped cream to elevate its richness even further. For a fun twist, consider adding fresh raspberries or strawberries on top of the cake or alongside the serving. The acidity of the berries beautifully balances the sweetness of the chocolate, creating an enjoyable contrast.

If you're feeling adventurous, you could also incorporate flavors into the cake or frosting. Adding a teaspoon of espresso powder enhances the chocolate flavor without overpowering it. For a seasonal take, try mixing in some peppermint extract before frosting during the holiday season, giving it a delightful holiday twist without much effort.

Questions About Recipes

→ Can I use cocoa powder instead of chocolate?

Yes, this recipe is designed around cocoa powder, which gives great flavor.

→ How can I store leftover cake?

Store in an airtight container at room temperature for up to three days or refrigerate for up to a week.

→ What pans can I use for this recipe?

It works best in a sheet pan, but you can also use two round pans.

→ Can I make this cake ahead of time?

Absolutely! Prepare the cake and frosting a day in advance, and frost it just before serving.