Chocolate Sheet Cake with Chocolate Caramel Frosting
Introduction
Have you ever craved a dessert that combines rich chocolate with the deep, buttery sweetness of caramel? This Chocolate Sheet Cake with Chocolate Caramel Frosting is the ultimate treat for chocolate lovers. Perfect for birthdays, potlucks, or simply indulging after dinner, this cake delivers a moist, tender crumb topped with a silky caramel-flavored chocolate frosting.
With simple ingredients and straightforward steps, this recipe makes it easy to create a show-stopping dessert. Whether you choose traditional all-purpose flour or a gluten-free blend, the results are equally delicious. Let’s dive into the details of how to make this irresistible cake.
Ingredients
For the Cake:
- 2 cups granulated sugar
- 1-3/4 cups (210g) all-purpose flour or gluten-free flour blend
- 3/4 cup cocoa powder
- 2 tsp baking soda
- 1 tsp baking powder
- 1/2 tsp kosher or fine sea salt
- 1 cup buttermilk
- 1/2 cup vegetable oil
- 2 large eggs
- 2 tsp chocolate extract
- 2 tsp pure vanilla extract or vanilla paste
- 1 cup boiling water
For the Chocolate Caramel Frosting:
- 9 oz dark chocolate, chopped
- 1 cup granulated sugar
- 3 tbsp water
- 1-1/4 cups heavy cream
- Pinch of fine sea salt
- 1 tsp pure vanilla extract or vanilla paste
Ingredient Tips and Substitutions
- For a gluten-free option, use a high-quality gluten-free flour blend.
- If you don’t have buttermilk, mix 1 tbsp vinegar or lemon juice with 1 cup milk and let it sit for 5 minutes.
- Substitute chocolate extract with additional vanilla extract if needed.
- Opt for high-quality dark chocolate (60-70% cocoa) for the best frosting flavor.
Step-by-Step Instructions
Prepare the Cake
Adjust the oven rack to the middle position and preheat to 350°F. Butter a 9×13-inch baking pan and line it with parchment paper, leaving an overhang on two sides for easier removal later. Lightly butter the parchment.
In the bowl of a stand mixer with the paddle attachment, combine sugar, flour, cocoa powder, baking soda, baking powder, and salt. Mix on low until evenly blended.
Add the buttermilk, oil, eggs, chocolate extract, and vanilla. Mix on low until combined, occasionally scraping the bowl to ensure no dry pockets remain.
Gradually add the boiling water, pulsing the mixer on and off to avoid splashing. Once incorporated, beat on low for 1 minute. The batter will be thin.
Pour into the prepared pan and tap gently on the counter to remove air bubbles. Bake for 30-40 minutes, or until a toothpick comes out with a few moist crumbs. Cool completely before frosting.
Make the Chocolate Caramel Frosting
Place chopped chocolate in the stand mixer bowl and set near the stove.
In a heavy-bottomed saucepan with a light interior, combine sugar and water. Stir once, then heat over medium-high without stirring, swirling occasionally for even browning. Once bubbling, cover with a tight lid for 1-2 minutes to dissolve sugar crystals.
Continue heating until the caramel turns amber. Remove from heat and slowly whisk in heavy cream—it will bubble vigorously, so whisk constantly until smooth. If needed, return to low heat briefly to melt hardened bits.
Stir in vanilla and salt. Pour caramel over the chocolate and let sit for a few minutes before whisking in small circles until fully melted and smooth.
Refrigerate for 45 minutes, stirring occasionally. Once cooled, beat on medium-high until fluffy—about 2 minutes.
Assemble the Cake
Once the cake has cooled and the frosting is fluffy, spread it evenly over the top with an offset spatula. Use the parchment sling to lift the cake for easy slicing.
Nutritional Information
Per serving (1/12 of cake):
- Calories: 480
- Protein: 5g
- Carbohydrates: 68g
- Fat: 22g
- Fiber: 3g
Preparation Time
- Prep time: 25 minutes
- Cook time: 35 minutes
- Cooling and frosting: 1 hour
- Total time: Approx. 2 hours
This Chocolate Sheet Cake with Chocolate Caramel Frosting takes roughly the same effort as making a batch of brownies, but the payoff is far more impressive.
Healthier Alternatives
- Replace half the sugar with coconut sugar for a lower glycemic index.
- Use almond or oat milk mixed with vinegar for a dairy-free buttermilk substitute.
- Swap heavy cream with full-fat coconut milk for a vegan caramel option.
Serving Suggestions
- Top with flaky sea salt or crushed toasted nuts for extra texture.
- Pair with coffee, espresso, or a glass of cold milk to balance the richness.
- Serve with fresh berries or a scoop of vanilla ice cream for a decadent dessert.
Common Mistakes to Avoid
- Overmixing the batter after adding flour can lead to a dense cake.
- Baking in a dark-colored pan may cause over-browning—opt for light metal pans.
- Adding hot caramel too quickly to cold chocolate can cause separation.
Storage Tips
- Store covered at room temperature for up to 2 days.
- Refrigerate for up to 5 days—let slices come to room temperature before serving.
- Freeze unfrosted layers wrapped in plastic for up to 3 months.
Conclusion
This Chocolate Sheet Cake with Chocolate Caramel Frosting is a must-try for any baking enthusiast. Moist, rich, and topped with a luxurious caramel-infused frosting, it’s a dessert that delights with every bite.
Have you made this recipe? Share your experience in the comments below and let us know how it turned out!
Frequently Asked Questions
Can I use milk chocolate instead of dark chocolate for the frosting?
Yes, but the frosting will be sweeter. Reduce sugar slightly if preferred.
What’s the best way to prevent the caramel from crystallizing?
Avoid stirring once the sugar dissolves—swirl the pan gently instead.
Can I make this cake in layers instead of a sheet pan?
Yes, divide the batter between two 9-inch round pans and reduce baking time slightly.
How do I know when the caramel is ready?
Aim for a deep amber color—too light and it’s undercooked, too dark and it’s bitter.
Can I make the frosting ahead of time?
Yes, refrigerate for up to 2 days—rewhip before using.
Can I skip the parchment sling?
Yes, but slicing and serving directly from the pan will be trickier.
Does this cake need to be refrigerated?
Only if storing beyond 2 days—otherwise, room temperature is fine.
Can I use a hand mixer instead of a stand mixer?
Yes, but whisking stiff frosting may take longer.
Chocolate Sheet Cake with Chocolate Caramel Frosting
Ingredients
For the Cake
- 2 cups granulated sugar
- 1-3/4 cups all-purpose flour or gluten-free flour blend (210g)
- 3/4 cup cocoa powder
- 2 tsp baking soda
- 1 tsp baking powder
- 1/2 tsp kosher or fine sea salt
- 1 cup buttermilk
- 1/2 cup vegetable oil
- 2 large eggs
- 2 tsp chocolate extract
- 2 tsp pure vanilla extract or vanilla paste
- 1 cup boiling water
For the Chocolate Caramel Frosting
- 9 oz dark chocolate chopped
- 1 cup granulated sugar
- 3 tbsp water
- 1-1/4 cups heavy cream
- Pinch of fine sea salt
- 1 tsp pure vanilla extract or vanilla paste
Instructions
Prepare the Cake
- Adjust the oven rack to the middle position and preheat to 350°F. Butter a 9x13-inch baking pan and line it with parchment paper, leaving an overhang on two sides for easier removal later. Lightly butter the parchment.
- In the bowl of a stand mixer with the paddle attachment, combine sugar, flour, cocoa powder, baking soda, baking powder, and salt. Mix on low until evenly blended.
- Add the buttermilk, oil, eggs, chocolate extract, and vanilla. Mix on low until combined, occasionally scraping the bowl to ensure no dry pockets remain.
- Gradually add the boiling water, pulsing the mixer on and off to avoid splashing. Once incorporated, beat on low for 1 minute. The batter will be thin.
- Pour into the prepared pan and tap gently on the counter to remove air bubbles. Bake for 30-40 minutes, or until a toothpick comes out with a few moist crumbs. Cool completely before frosting.
Make the Chocolate Caramel Frosting
- Place chopped chocolate in the stand mixer bowl and set near the stove.
- In a heavy-bottomed saucepan with a light interior, combine sugar and water. Stir once, then heat over medium-high without stirring, swirling occasionally for even browning. Once bubbling, cover with a tight lid for 1-2 minutes to dissolve sugar crystals.
- Continue heating until the caramel turns amber. Remove from heat and slowly whisk in heavy cream—it will bubble vigorously, so whisk constantly until smooth. If needed, return to low heat briefly to melt hardened bits.
- Stir in vanilla and salt. Pour caramel over the chocolate and let sit for a few minutes before whisking in small circles until fully melted and smooth.
- Refrigerate for 45 minutes, stirring occasionally. Once cooled, beat on medium-high until fluffy—about 2 minutes.
Assemble the Cake
- Once the cake has cooled and the frosting is fluffy, spread it evenly over the top with an offset spatula. Use the parchment sling to lift the cake for easy slicing.
