There is a specific, comforting sound that a wooden spoon makes when it scrapes against the side of a ceramic mixing bowl. It is a sound that instantly takes me back to my grandmother’s kitchen on a Sunday afternoon, where the air was always heavy with the scent of melting butter and cocoa. This old fashioned chocolate cake is a testament to those memories—a simple, honest dessert that doesn’t need fancy layers or piping to steal the show. It is the kind of cake that invites you to pull up a chair and stay a while.
This sheet cake is known for its incredibly moist crumb and the signature boiled fudge icing that gets poured over it while it is still warm from the oven. The result is a seamless fusion of cake and frosting, creating a tender, rich texture that improves as it sits. It is a timeless classic that brings warmth to any table.
Why This Recipe is a Keeper
In a world of complicated pastries and towering layer cakes, there is a quiet beauty in a simple 9×13 sheet cake. This recipe relies on pantry staples and a straightforward method that has been cherished for generations. The magic lies in the “pour-over” technique; by adding the hot icing to the warm cake, you seal in the moisture, creating a texture that is dense yet tender.
Here is why this cake will become a regular in your rotation:
- Timeless Flavor: The combination of buttermilk and cinnamon gives it a depth that modern recipes often miss.
- No Fancy Equipment: You don’t even need an electric mixer; a saucepan and a spoon work just fine.
- Crowd-Pleaser: It serves a crowd comfortably, making it perfect for potlucks or family gatherings.
Old Fashioned Chocolate Cake
- Total Time: 45 mins
- Yield: 15 servings
- Diet: Vegetarian
Description
This classic 9×13 sheet cake features an incredibly moist crumb infused with a hint of cinnamon and topped with a rich, boiled chocolate fudge icing. By pouring the warm frosting over the hot cake, you create a seamless, decadent dessert that is perfect for potlucks and family gatherings.
Ingredients
- 1 cup butter
- 1 cup water
- 8 tablespoons unsweetened cocoa powder, divided
- 1/2 cup plus 1/3 cup buttermilk, divided
- 1 teaspoon baking soda
- 2 large eggs, beaten
- 2 teaspoons vanilla extract, divided
- 2 cups all-purpose flour
- 2 cups white sugar
- 1 teaspoon ground cinnamon
- 1/2 teaspoon salt
- 1 pound confectioners’ sugar
- 1 cup chopped pecans
Instructions
- Preheat oven to 350 degrees F (175 degrees C) and grease and flour a 9×13 inch baking pan.
- In a saucepan over medium heat, melt 1 cup of butter and stir in water and 4 tablespoons of cocoa powder; bring to a boil then remove from heat to cool slightly.
- In a medium bowl, combine 1/2 cup buttermilk with baking soda, then stir in the beaten eggs and 1 teaspoon vanilla extract before whisking in the cooled cocoa mixture.
- In a large bowl, sift together flour, white sugar, cinnamon, and salt; create a well and stir in the chocolate mixture by hand until blended.
- Pour batter into the prepared pan and bake for 30 minutes, or until a toothpick inserted in the center comes out clean.
- While the cake is in its final minutes of baking, melt 1/2 cup butter with 4 tablespoons cocoa powder and 1/3 cup buttermilk in a saucepan; remove from heat and whisk in confectioners’ sugar, 1 teaspoon vanilla, and chopped pecans.
- Pour the warm icing directly over the hot cake immediately after removing it from the oven and spread gently to the edges.
Notes
To ensure a perfectly smooth icing, always sift your confectioners’ sugar before adding it to the saucepan to prevent stubborn lumps. For a deeper chocolate flavor, you can replace the water in the cake batter with hot brewed coffee without changing the overall texture.
- Prep Time: 15 mins
- Cook Time: 30 mins
- Category: Dessert
- Method: Baking
- Cuisine: American
The Pantry Staples

One of the reasons this cake has stood the test of time is that it uses humble ingredients to create something extraordinary. Quality matters here, so use the best you have on hand.
- Butter: Salted or unsweetened works, but I prefer unsweetened to control the sodium. This provides the rich base for both the batter and the icing.
- Unsweetened Cocoa Powder: Regular natural cocoa powder is traditional here. It blooms in the hot liquid to release its full flavor potential.
- Buttermilk: This is the secret to the tender crumb. The acidity reacts with the baking soda to help the cake rise and keeps it incredibly moist.
- Cinnamon: A teaspoon of ground cinnamon might seem unusual for chocolate cake, but it is a classic vintage touch that adds warmth without being overpowering.
- Pecans: Chopped pecans add a wonderful crunch to the fudge icing, contrasting beautifully with the soft cake.
How to Bake It
Step 1: Prep the Kitchen
Start by preheating your oven to 350 degrees F (175 degrees C). Grease and flour a 9×13 inch baking pan generously. This ensures the first slice comes out as easily as the last.
Step 2: Melt the Chocolate Base
In a saucepan over medium heat, melt 1 cup of butter. Stir in the water and 4 tablespoons of cocoa powder. Whisk gently until the mixture comes to a boil, then remove it from the heat immediately. Set this aside to cool slightly.
Step 3: Mix the Wet Ingredients
In a medium bowl, combine 1/2 cup of buttermilk with the baking soda. You will see it fizz slightly—that is the chemistry at work. Stir in the beaten eggs and vanilla extract. deeply whisk in the cooled cocoa mixture until everything is glossy and combined.
Step 4: Combine with Dry Ingredients
In a large bowl, sift together the all-purpose flour, white sugar, cinnamon, and salt. Make a well in the center and pour in the chocolate-buttermilk mixture. Stir by hand just until the flour disappears and the batter is blended. Pour this into your prepared pan.
Step 5: Bake
Bake for about 30 minutes. You will know it is done when a toothpick inserted into the center comes out clean or with just a few moist crumbs attached. While the cake bakes, you can rest, but be ready to make the icing as soon as it comes out.
Step 6: Make the Boiled Icing
About 5 minutes before the cake is done, start the icing. In a large saucepan, melt 1/2 cup butter with 4 tablespoons cocoa powder and 1/3 cup buttermilk. Heat until it is almost boiling, stirring constantly. Remove from heat and whisk in the confectioners’ sugar, vanilla, and pecans until smooth.
Step 7: Pour and Serve
This is the most crucial step: pour the warm icing directly over the hot cake as soon as you take it out of the oven. Spread it gently to the edges. Let it set before slicing.
Secrets from the Recipe Box

Baking this cake is simple, but a few grandmotherly tricks ensure it turns out perfect every time. First, sift your confectioners’ sugar for the icing. There is nothing worse than white lumps of sugar in your smooth chocolate fudge.
Second, do not overbake. This cake is meant to be moist. Check it at the 25-minute mark just to be safe. If you bake it too long, it loses that wonderful, fudgy texture we all love.
Lastly, if you want to understand more about the heritage behind our baking philosophy, you can read about our story at Cake Half. We believe that understanding the “why” behind a recipe makes the baking process even more rewarding.
Make It Your Own
While the classic recipe is perfection, every kitchen has its own twist. Here are a few ways to adapt this recipe to your taste:
- Coffee Lover’s Twist: Substitute the water in the cake batter with hot brewed coffee. It deepens the chocolate flavor without making the cake taste like a latte.
- Nut-Free: If you have allergies or just prefer a smooth texture, you can omit the pecans entirely. The fudge icing stands well on its own.
- Spiced Up: Increase the cinnamon or add a pinch of cayenne pepper for a Mexican hot chocolate vibe.
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At the Table

This cake is incredibly rich, so a small square goes a long way. It is best served warm, perhaps with a scoop of vanilla bean ice cream melting into the fudge icing. For a simpler treat, a cold glass of milk or a hot cup of black coffee pairs perfectly with the sweetness.
This is the ideal dessert for potlucks because it travels well right in the pan. If you are looking for more desserts that are perfect for sharing, browse our collection at Cake Half.
The Last Slice
There is something grounding about baking a recipe that has been loved by so many before us. This old fashioned chocolate cake is more than just a dessert; it is a slice of history, a comfort during busy weeks, and a celebration of simple ingredients. Whether you are baking for a birthday or just a Tuesday night, I hope this cake brings a little bit of that vintage magic into your kitchen.
If you enjoyed this recipe, I would love to see your creations. Share a photo and tag us on Instagram or pin this recipe to your board on Pinterest. You can also join our community on Facebook for more baking tips. For those who love comparing classics, this recipe shares a kinship with the version found on Allrecipes, proving that good taste is universal.







