Chocolate Sheet Cake With Frosting

Highlighted under: Soft Inspiration

I absolutely love baking, and one of my favorites to whip up is this Chocolate Sheet Cake with Frosting. It’s perfectly moist, rich in chocolate flavor, and easy to prepare, making it a go-to for any occasion. Whether I'm celebrating a birthday or simply treating my family to a sweet delight, this cake never fails to impress. Plus, the frosting is the perfect finishing touch that ties all that chocolate goodness together. Trust me, your taste buds will thank you!

Darcy Penrose

Created by

Darcy Penrose

Last updated on 2026-01-24T11:05:35.494Z

One sunny afternoon, I ended up experimenting in my kitchen and decided to make a chocolate sheet cake. It was both exciting and a bit daunting since I wanted it to have the perfect texture and sweetness. After a couple of tweaks, I found that adding a touch of espresso powder really enhanced the chocolate flavor without overpowering it.

I've often used the classic two-bowl mixing method for cakes, which allows for proper incorporation of ingredients. This way, I never end up with flour pockets in my batter. Each time I make this cake, I learn something new about how simple ingredients can come together to create a showstopper dessert!

Why You Will Love This Recipe

  • Rich chocolate flavor paired with creamy frosting
  • Incredibly easy to make for any skill level
  • Perfect for gatherings or as a weeknight treat

Understanding the Ingredients

The success of this Chocolate Sheet Cake lies in its carefully selected ingredients. The combination of all-purpose flour and granulated sugar creates a light texture, while the unsweetened cocoa powder gives it that rich, chocolaty flavor. The baking powder and baking soda work together to provide the necessary lift, ensuring a moist and fluffy texture. Avoid subbing baking soda for baking powder, as it could disrupt the cake's rise and texture.

Using whole milk instead of low-fat or skim milk is crucial in this recipe. Whole milk adds moisture and richness, enhancing the overall flavor of the cake. If you're looking for a dairy-free option, you can substitute with almond or oat milk, though this may slightly alter the cake's texture. Be sure to use a high-quality cocoa powder for the best results, as it will directly impact the taste of your cake.

Perfecting the Technique

Mixing the batter correctly is key to achieving the desired lightness. When you combine the wet and dry ingredients, mix at medium speed for about two minutes. This will allow enough air to incorporate into the batter, ensuring the cake rises properly. Make sure to stir in the boiling water last; this step helps to bloom the cocoa powder, enhancing the chocolate flavor and making the batter smoother.

Baking time is critical; keep an eye on it during the last few minutes. The cake is done when a toothpick inserted in the center comes out clean or with a few moist crumbs attached. If the toothpick comes out with wet batter, it needs more time. Remember that oven temperatures can vary, so if this is your first time baking this cake, check for doneness a couple of minutes early to avoid overbaking.

Storage and Serving Suggestions

Once your cake has cooled, it can be stored in an airtight container at room temperature for up to three days. If you want to keep it longer, wrap individual slices in plastic wrap and freeze them. This way, you’ll have a delicious chocolate treat on hand whenever you crave something sweet. Just thaw at room temperature for an hour before enjoying, or pop it in the microwave for a neat 15 seconds for instant gratification.

For serving, consider pairing the cake with fresh berries or a scoop of vanilla ice cream to balance out the richness of the chocolate. If you're feeling festive, dust the top with powdered sugar or add chocolate shavings for a decorative finish. This cake can also be easily scaled; simply double the recipe for a larger crowd or halve it for a more modest dessert.

Ingredients

Gather the following ingredients to make your Chocolate Sheet Cake with Frosting:

For the Cake

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

For the Frosting

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

Once you have everything ready, you'll be all set to begin baking!

Instructions

Follow these simple steps to create your delicious Chocolate Sheet Cake:

Preheat the Oven

Preheat your oven to 350°F (175°C) and grease a 13x18 inch baking sheet.

Mix Dry Ingredients

In a large bowl, mix together the flour, sugar, cocoa powder, baking powder, baking soda, and salt until well combined.

Add Wet Ingredients

Add the eggs, milk, oil, and vanilla extract to the dry ingredients. Mix on medium speed for 2 minutes. Stir in the boiling water until combined.

Bake the Cake

Pour the batter into the prepared baking sheet and bake for 25 minutes or until a toothpick inserted in the center comes out clean.

Prepare the Frosting

In a medium bowl, cream together the butter and cocoa powder. Gradually add the powdered sugar and milk, beating until smooth. Stir in the vanilla.

Frost the Cake

Allow the cake to cool completely before spreading the frosting evenly over the top.

Enjoy your wonderfully rich Chocolate Sheet Cake!

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Pro Tips

  • For an extra touch, try adding chocolate chips to the batter before baking or sprinkling chopped nuts on top of the frosting for added texture.

Troubleshooting Common Issues

If your cake comes out too dry, it may have been overbaked. Always start checking for doneness a couple of minutes before the recommended time. Alternatively, if it feels too dense, it could be a sign that the batter was overmixed. The gluten in the flour will tighten up, leading to a less tender crumb. Remember to mix just until combined for optimal texture.

Should you find yourself with a cake that has a cracked top, don't fret! This can happen if your oven temperature is too high or if the batter was mixed too aggressively. Adjust your baking technique for future attempts by monitoring your oven's temperature with an oven thermometer and controlling your mixing speed.

Flavor and Texture Enhancements

To elevate the flavor, consider adding a teaspoon of espresso powder to the dry ingredients. This enhancer will intensify the chocolate flavor without adding a distinct coffee taste. Additionally, if you crave a hint of decadence, fold in mini chocolate chips into the batter for bursts of melted chocolate in each bite.

For an interesting twist, experiment with flavored extracts such as almond or hazelnut in place of vanilla. This small change can provide a delightful depth of flavor, making the cake unique. Just remember to use these substitutes sparingly, as they can quickly overpower the chocolate notes.

Questions About Recipes

→ Can I use a different type of flour?

Yes, you can use whole wheat flour for a healthier option, but the texture might be slightly different.

→ How can I store leftovers?

Store the cake in an airtight container at room temperature for up to 3 days. It can also be refrigerated for longer freshness.

→ Can I make this in advance?

Absolutely! You can bake the cake a day ahead and frost it the next day for optimal flavor.

→ Can I freeze the cake?

Yes, you can freeze the unfrosted cake for up to 3 months. Just wrap it tightly in plastic wrap.

Chocolate Sheet Cake With Frosting

I absolutely love baking, and one of my favorites to whip up is this Chocolate Sheet Cake with Frosting. It’s perfectly moist, rich in chocolate flavor, and easy to prepare, making it a go-to for any occasion. Whether I'm celebrating a birthday or simply treating my family to a sweet delight, this cake never fails to impress. Plus, the frosting is the perfect finishing touch that ties all that chocolate goodness together. Trust me, your taste buds will thank you!

Prep Time20 minutes
Cooking Duration25 minutes
Overall Time45 minutes

Created by: Darcy Penrose

Recipe Type: Soft Inspiration

Skill Level: Beginner

Final Quantity: Serves 12

What You'll Need

For the Cake

  1. 2 cups all-purpose flour
  2. 2 cups granulated sugar
  3. 3/4 cup unsweetened cocoa powder
  4. 1 1/2 teaspoons baking powder
  5. 1 1/2 teaspoons baking soda
  6. 1 teaspoon salt
  7. 2 large eggs
  8. 1 cup whole milk
  9. 1/2 cup vegetable oil
  10. 2 teaspoons vanilla extract
  11. 1 cup boiling water

For the Frosting

  1. 1/2 cup unsalted butter, softened
  2. 2/3 cup unsweetened cocoa powder
  3. 3 cups powdered sugar
  4. 1/3 cup whole milk
  5. 1 teaspoon vanilla extract

How-To Steps

Step 01

Preheat your oven to 350°F (175°C) and grease a 13x18 inch baking sheet.

Step 02

In a large bowl, mix together the flour, sugar, cocoa powder, baking powder, baking soda, and salt until well combined.

Step 03

Add the eggs, milk, oil, and vanilla extract to the dry ingredients. Mix on medium speed for 2 minutes. Stir in the boiling water until combined.

Step 04

Pour the batter into the prepared baking sheet and bake for 25 minutes or until a toothpick inserted in the center comes out clean.

Step 05

In a medium bowl, cream together the butter and cocoa powder. Gradually add the powdered sugar and milk, beating until smooth. Stir in the vanilla.

Step 06

Allow the cake to cool completely before spreading the frosting evenly over the top.

Extra Tips

  1. For an extra touch, try adding chocolate chips to the batter before baking or sprinkling chopped nuts on top of the frosting for added texture.

Nutritional Breakdown (Per Serving)

  • Calories: 380 kcal
  • Total Fat: 26g
  • Saturated Fat: 15g
  • Cholesterol: 195mg
  • Sodium: 85mg
  • Total Carbohydrates: 32g
  • Dietary Fiber: 3g
  • Sugars: 24g
  • Protein: 6g