Ridiculously Easy Caramel Buttermilk Sheet Cake
This Caramel Buttermilk Sheet Cake is a soft, buttery, tender cake topped with a rich homemade caramel icing that melts beautifully over the warm surface. Made with simple pantry staples like butter, buttermilk, vanilla, brown sugar, and powdered sugar, this easy sheet cake comes together quickly without complicated techniques.
Baked in a 10×15-inch jelly roll pan, the cake has a thin, tender crumb that pairs perfectly with the sweet caramel topping. The icing is poured over the cake while it is still warm, creating a smooth, glossy layer that sets into a deliciously rich finish.
It’s an excellent dessert for family gatherings, potlucks, holidays, bake sales, and easy weeknight treats. If you love classic sheet cakes and homemade caramel frosting, this recipe is definitely worth adding to your dessert rotation.
Why Everyone Loves Caramel Buttermilk Sheet Cake
- Quick and easy: The cake uses simple ingredients and straightforward preparation.
- Soft and tender: Buttermilk adds moisture and a subtle tang to the buttery cake.
- Rich caramel topping: The brown sugar and butter icing creates a sweet, buttery caramel flavor.
- Perfect for sharing: A 10×15-inch sheet pan produces plenty of easy-to-cut servings.
- No complicated decorating: Simply pour the warm icing over the cake and spread it evenly.
- Great for gatherings: This easy sheet cake travels well and is perfect for potlucks and family celebrations.
Ingredients Overview
- Butter – Adds richness and buttery flavor to both the cake and caramel icing.
- Water – Helps create the liquid base for the cake batter.
- Buttermilk – Adds moisture and a subtle tang while helping create a tender crumb.
- Eggs – Provide structure and help bind the cake ingredients together.
- Vanilla extract – Enhances the overall flavor of the cake and icing.
- Almond extract – Adds a subtle nutty sweetness that complements the caramel flavor.
- Baking powder – Helps the cake rise and become light and tender.
- Salt – Balances the sweetness and enhances the buttery flavors.
- Baking soda – Works with the buttermilk to help the cake rise.
- Granulated sugar – Sweetens the cake and contributes to its tender texture.
- All-purpose flour – Provides the structure for the sheet cake.
- Dark brown sugar – Gives the caramel icing its deep, rich molasses flavor.
- Powdered sugar – Thickens and sweetens the caramel icing while keeping it smooth.
Variations
- Pecan Caramel Cake – Sprinkle chopped toasted pecans over the warm caramel icing for added crunch.
- Chocolate Caramel Sheet Cake – Add cocoa powder to the cake batter for a chocolate version topped with caramel icing.
- Cinnamon Caramel Cake – Add a little ground cinnamon to the cake batter for warm, cozy flavor.
- Vanilla Caramel Cake – Increase the vanilla extract slightly and omit the almond extract for a classic vanilla-caramel flavor.
- Salted Caramel Cake – Add a small pinch of flaky sea salt over the finished icing for a sweet-and-salty contrast.
- Toffee Caramel Cake – Sprinkle chopped toffee pieces over the icing while it is still warm.
How to Make Ridiculously Easy Caramel Buttermilk Sheet Cake
1. Preheat the Oven
Preheat your oven to 375°F (190°C).
Generously spray a 10×15-inch jelly roll pan or sheet pan with baking spray. Use a paper towel to spread the spray evenly across the bottom and sides of the pan.
2. Melt the Butter
Place the cubed butter and water in a medium-to-large microwave-safe bowl.
Microwave on high for approximately 2 minutes, or until most of the butter has melted.
Remove the bowl and stir until the remaining butter melts completely.
3. Add the Buttermilk and Eggs
Pour the buttermilk into the warm butter mixture and whisk until combined.
Add the eggs and whisk again until the mixture is smooth.
4. Add the Flavoring and Leavening
Add the baking powder, baking soda, salt, vanilla extract, and almond extract.
Stir well until the ingredients are evenly incorporated throughout the mixture.
5. Add the Sugar and Flour
Add the granulated sugar and all-purpose flour.
Whisk until the batter becomes smooth and free of large lumps.
Don’t worry if the mixture looks slightly lumpy at first. Continue whisking until the batter comes together.
6. Bake the Sheet Cake
Pour the batter into the prepared pan and spread it evenly.
Bake for approximately 18–25 minutes, or until the cake is golden and a toothpick inserted into the center comes out clean.
Because sheet cakes are relatively thin, begin checking around the 18-minute mark to avoid overbaking.
7. Cool the Cake Briefly
Transfer the cake to a wire rack and allow it to cool for approximately 15 minutes.
While the cake is cooling, prepare the caramel icing.
The cake should still be warm when you pour the icing over it.
8. Make the Caramel Icing
Add the butter and dark brown sugar to a medium saucepan.
Cook over medium heat, stirring, until the butter melts and the mixture comes to a boil.
If the mixture appears separated, whisk vigorously until it comes together.
Add the buttermilk, vanilla extract, and almond extract.
Stir and bring the mixture back to a boil.
9. Add the Powdered Sugar
Remove the saucepan from the heat.
Add the powdered sugar and stir vigorously until the icing becomes smooth and free of lumps.
Work relatively quickly because the icing will begin to thicken as it cools.
10. Pour Over the Warm Cake
Pour the warm caramel icing evenly over the surface of the warm cake.
Use an angled spatula or cake knife to spread the icing across the cake.
You can create gentle swirls in the icing if desired, but avoid overworking it once it begins to thicken.
Allow the cake to cool before slicing and serving.
Pro Tips and Cooking Secrets
Use the correct pan size. A 10×15-inch jelly roll pan gives this cake its characteristic thin, tender texture. A smaller pan will make the cake thicker and may change the baking time.
Don’t overbake the cake. Start checking around 18 minutes. Remove it once a toothpick comes out clean to keep the cake soft and moist.
Pour the icing over a warm cake. The warm cake helps the caramel icing spread easily and creates that signature sheet-cake finish.
Work quickly with the icing. Powdered sugar causes the caramel icing to thicken as it cools, so spread it over the cake soon after mixing.
Serving Suggestions
- Serve slices with a cup of hot coffee or tea for an easy afternoon dessert.
- Add chopped pecans over the caramel icing for extra crunch and flavor.
- Sprinkle a little flaky sea salt over the caramel topping for a salted caramel variation.
- Serve slightly warm with a scoop of vanilla ice cream for an indulgent dessert.
How to Store Caramel Buttermilk Sheet Cake
Allow the cake to cool completely before covering it.
Store leftover Caramel Buttermilk Sheet Cake in an airtight container or cover the baking pan tightly with plastic wrap or foil.
It can be kept at room temperature for a short period, provided the environment is cool. For longer storage, refrigerate the cake in an airtight container.
Before serving refrigerated cake, allow it to sit at room temperature for a few minutes so the caramel icing can soften slightly.
Can You Freeze Caramel Buttermilk Sheet Cake?
Yes, this cake can be frozen.
For the best results, allow the cake and icing to cool completely before freezing. Cut the cake into individual portions and wrap them tightly in plastic wrap, then place them in a freezer-safe container or bag.
Thaw the pieces in the refrigerator or at room temperature before serving.
Make-Ahead Tips
You can prepare the cake ahead of time and keep it covered until you’re ready to serve.
For gatherings, bake the cake earlier in the day and allow the caramel icing to set completely before cutting it into squares.
For easier serving, you can slice the cake once completely cooled and arrange the pieces on a serving platter.
Caramel Buttermilk Sheet Cake FAQs
Can I use regular milk instead of buttermilk?
The recipe specifically calls for buttermilk, which contributes moisture and a subtle tang to the cake. Using regular milk may produce a slightly different texture and flavor.
What size pan should I use?
A 10×15-inch jelly roll pan or sheet pan is recommended for this recipe. The large surface area creates the thin sheet-cake texture.
Why is my caramel icing separating?
If the butter and brown sugar mixture appears separated while cooking, whisk it vigorously to bring the mixture back together before adding the remaining ingredients.
Why did my caramel icing become too thick?
The icing naturally thickens as it cools. If it becomes difficult to spread, it was likely allowed to cool too much before being applied. Pour and spread it while it is still warm.
Can I add nuts to the cake?
Yes. Chopped pecans are an especially good pairing with the buttery caramel icing. Sprinkle them over the icing before it sets.
How do I know when the cake is done?
Insert a toothpick into the center of the cake. It should come out clean when the cake is ready. Start checking around 18 minutes, since oven temperatures and baking pans can vary.
Ridiculously Easy Caramel Buttermilk Sheet Cake
Equipment
- 10×15 jelly roll pan or sheet pan
- microwave-safe bowl
- Medium-size pot
- whisk
- wire rack
- Angled cake knife
Ingredients
- 1 cup butter, cubed
- 1 cup water
- 1/2 cup buttermilk
- 2 large eggs
- 2 teaspoons vanilla extract
- 1/8 teaspoon almond extract
- 1 teaspoon baking powder
- 3/4 teaspoon salt
- 1/4 teaspoon baking soda
- 2 cups sugar
- 2 cups all-purpose flour
- 1/2 cup butter
- 1 cup dark brown sugar
- 1/4 cup buttermilk
- 1 teaspoon vanilla extract
- 1/8 teaspoon almond extract
- 2 cups powdered sugar
Instructions
- Preheat oven to 375˚F. Spray a 10×15 jelly roll pan or a sheet pan generously with baking spray and rub with a paper towel to coat all surfaces. Set aside.
- In a medium-large microwave-safe bowl, combine the cubed butter and water. Microwave on high for 2 minutes. Most of the butter should be melted. Remove from the microwave and stir until butter is completely melted.
- Add the buttermilk and whisk until well combined then add the eggs and whisk again.
- Add the baking powder, baking soda, salt, vanilla and almond extracts and stir to combine.
- Add the sugar and flour and whisk until smooth and lump-free. It will seem lumpy at first but keep stirring. It will get nice and smooth. A whisk works great for this.
- Transfer to the prepared pan. Bake until golden brown and a toothpick inserted in the center comes out clean, 18-25 minutes.
- Cool on a wire rack for 15 minutes. For the caramel icing: While the cake is cooling, make the icing by combining the butter and brown sugar in a medium-size pot. Cook over medium heat until the butter is melted and the mixture comes to a boil. Add the buttermilk and the vanilla and almond extracts. Stir and return to a boil then turn off the heat and add the powdered sugar. Stir until nice and smooth
- Toward the end of the baking time make the icing by combining the butter and brown sugar in a medium-size pot over medium heat.
- Stir until the butter melts and the mixture comes to a boil. If the mixture seems separated, whisk vigorously to combine. Add the milk and return the mixture to a boil.
- Turn off the heat and add the vanilla and almond extracts and the powdered sugar. Stir vigorously until the icing is smooth and there are no lumps.
- Pour the icing over the warm cake and, working quickly, spread with the icing to cover the cake. (An angled cake knife works well for this.) Swirl the icing if desired. Once the icing starts to thicken, stop spreading and/or swirling. Allow the cake to cool and enjoy!
