Southern Chocolate Sheet Cake Recipe: Crowd-Pleasing Party Dessert

This classic chocolate sheet cake is the ultimate dessert for any gathering. With its moist, fudgy texture and rich cocoa flavor, it’s guaranteed to disappear quickly at parties, potlucks, and family events. The sour cream in the batter creates an incredibly tender crumb that keeps the cake moist for days.

Sheet cakes are perfect for feeding a crowd without the fuss of layer cakes. They’re easy to transport, simple to slice, and everyone gets a generous portion. This recipe combines traditional Southern baking techniques with modern convenience for a dessert that feels both nostalgic and contemporary.

Ingredients

For the Cake:

• 2 cups all-purpose flour
• 2 cups granulated sugar
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup unsalted butter
• 1/4 cup cocoa powder
• 1 cup water
• 1/2 cup sour cream
• 2 large eggs
• 1 teaspoon vanilla extract

For the Chocolate Glaze:

• 1/2 cup unsalted butter
• 1/4 cup cocoa powder
• 6 tablespoons milk
• 1 teaspoon vanilla extract
• 3 1/2 cups powdered sugar
• 1 cup chopped pecans (optional)

Step-by-Step Instructions

Step 1: Preheat and Prepare

Preheat your oven to 350°F (175°C). Grease a 10×15-inch jelly roll pan or similar sized baking sheet.

Step 2: Mix Dry Ingredients

In a large mixing bowl, whisk together flour, sugar, baking soda, and salt until well combined. Set aside.

Step 3: Create Chocolate Base

In a medium saucepan, melt butter over medium heat. Add cocoa powder and water, whisking constantly until smooth. Bring to a gentle boil, then remove from heat.

Step 4: Combine Wet and Dry Ingredients

Pour the hot chocolate mixture into the flour mixture and stir until just combined. Add sour cream, eggs, and vanilla extract, mixing until smooth and no streaks remain.

Step 5: Bake the Cake

Pour batter into prepared pan, spreading evenly. Bake for 20-25 minutes, or until a toothpick inserted in the center comes out clean. While cake bakes, prepare the glaze.

Step 6: Make the Chocolate Glaze

In a medium saucepan, melt butter over medium heat. Add cocoa powder and milk, whisking until smooth. Remove from heat and stir in vanilla extract. Gradually whisk in powdered sugar until glaze is smooth and pourable.

Step 7: Glaze the Cake

Pour warm glaze over the hot cake immediately after removing from oven. Use a spatula to spread evenly. If using pecans, sprinkle them over the glaze while it’s still warm.

Expert Tips

Room Temperature Ingredients: For best results, ensure your sour cream, eggs, and butter are at room temperature before beginning. This creates a smoother batter and more even texture.

Don’t Overmix: Once you add the flour mixture, mix just until combined. Overmixing can lead to a tough cake texture.

Timing is Key: The glaze works best when poured over the hot cake. The warm cake absorbs some of the glaze, creating a perfect seal that keeps it moist.

Storage: Store covered at room temperature for up to 3 days. This cake actually improves in flavor the next day as the flavors meld together. For longer storage, wrap tightly and freeze for up to 3 months.

If you’re looking for more elegant dessert options for special occasions, we have plenty of ideas that complement this chocolate sheet cake beautifully.

Frequently Asked Questions

Can I use buttermilk instead of sour cream?

Yes, buttermilk can be substituted for sour cream in equal amounts. The cake will be slightly lighter and tangier.

How can I make this cake ahead of time?

You can bake the cake up to 2 days in advance. Store it covered at room temperature and add the glaze the day you plan to serve it.

Can I add different nuts or toppings?

Absolutely! Walnuts or almonds work well in place of pecans. For a different twist, try adding shredded coconut or chocolate chips to the glaze.

Is this cake suitable for freezing?

Yes, this cake freezes beautifully. Freeze before glazing for best results, then add the glaze after thawing.

For more crowd-pleasing desserts perfect for gatherings, check out our retro dessert collection and our guide to childhood favorite recipes. These easy recipes are perfect for any celebration.

Southern Chocolate Sheet Cake

This classic chocolate sheet cake is perfect for gatherings with its moist, fudgy texture and rich cocoa flavor. The sour cream in the batter creates a tender crumb that keeps the cake moist for days, making it ideal for parties and family events.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 25 minutes mins

Total Time 40 minutes mins

Servings: 12 servings

Calories: 320

Ingredients Method Notes

Ingredients

  

Ingredients

• 2 cups all-purpose flour
• 2 cups granulated sugar
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup unsalted butter
• 1/4 cup cocoa powder
• 1 cup water
• 1/2 cup sour cream
• 2 large eggs
• 1 teaspoon vanilla extract
• 1/2 cup unsalted butter (for glaze)
• 1/4 cup cocoa powder (for glaze)
• 6 tablespoons milk
• 1 teaspoon vanilla extract (for glaze)
• 3 1/2 cups powdered sugar
• 1 cup chopped pecans (optional)

Method

 

Instructions

1. Preheat oven to 350°F (175°C) and grease a 10×15-inch jelly roll pan
2. In a large mixing bowl, whisk together flour, sugar, baking soda, and salt
3. In a saucepan, melt butter over medium heat, add cocoa powder and water, whisk until smooth and bring to gentle boil
4. Pour hot chocolate mixture into flour mixture and stir until combined
5. Add sour cream, eggs, and vanilla extract, mixing until smooth
6. Pour batter into prepared pan and bake for 20-25 minutes until toothpick comes out clean
7. While cake bakes, make glaze by melting butter in saucepan, adding cocoa powder and milk, whisking until smooth
8. Remove glaze from heat, stir in vanilla extract, then gradually whisk in powdered sugar
9. Pour warm glaze over hot cake immediately after removing from oven and spread evenly
10. Sprinkle with chopped pecans if using while glaze is still warm

Notes

Room temperature ingredients work best. Don’t overmix once flour is added. Glaze works best when poured over hot cake. Store covered at room temperature for up to 3 days.