Last updated: June 22, 2026
Texas sheet cake is the ultimate crowd-pleasing dessert — a thin, deeply chocolatey cake topped with warm poured fudge frosting that sets into a glossy, crackly layer as it cools. See the recipe card below for exact measurements and a printable version.
What Makes Texas Sheet Cake Different
Texas sheet cake is baked in a rimmed 18×13-inch half-sheet pan, which gives it that characteristic thin, fudgy texture rather than the airy crumb of a layer cake. The frosting is poured hot directly onto the warm cake so it seeps into the surface and melds into a single cohesive, brownie-like slab.
The Pan
The standard pan for this recipe is a half-sheet pan (18×13 inches, also called a jelly roll pan). Using a smaller pan will produce a thicker cake with a longer bake time, and the ratio of cake to frosting will shift noticeably. If a half-sheet pan is not available, a 15×10 pan works as a slightly thicker alternative.
The Chocolate
This recipe uses cocoa powder and butter together to create a deep chocolate flavor without melting chocolate bars. Blooming the cocoa — stirring it into hot liquid — intensifies the flavor significantly. Dutch-process cocoa produces a darker, smoother result, while natural cocoa gives a sharper, more acidic chocolate note.
Ingredients
For the Cake
The cake batter comes together in one saucepan, making this a genuinely easy recipe. The base is 2 cups all-purpose flour, 2 cups granulated sugar, and 1 teaspoon baking soda, whisked together dry in a large mixing bowl.
In a medium saucepan over medium heat, combine 1 cup (2 sticks) unsalted butter, 1 cup water, and 1/4 cup unsweetened cocoa powder. Bring to a boil, stirring constantly, then pour the hot mixture directly over the dry ingredients and stir until just combined.
Whisk in 2 large eggs, 1/2 cup sour cream, and 1 teaspoon vanilla extract until the batter is smooth. Sour cream is the key to keeping this cake moist even after a day or two at room temperature.
For the Frosting
The frosting starts in a saucepan just like the batter. Combine 1/2 cup (1 stick) unsalted butter, 6 tablespoons whole milk, and 1/4 cup unsweetened cocoa powder over medium heat, stirring until the butter melts and the mixture just reaches a boil.
Remove from heat and whisk in 3 1/2 cups powdered sugar, 1 teaspoon vanilla extract, and 1 cup chopped pecans if desired. Pouring this while hot is critical — it needs to be fluid enough to spread across the entire pan before it sets.
How to Make Texas Sheet Cake
Preparing the Pan and Oven
Preheat the oven to 350 degrees F. Grease the half-sheet pan thoroughly with butter or nonstick spray, then dust with flour or line with parchment. This cake sticks if the pan is not properly prepared, and releasing it cleanly matters for serving.
Making the Batter
Whisk the dry ingredients together in a large bowl first. Bring the butter, water, and cocoa to a boil in the saucepan, then pour it over the dry mixture immediately. Stir until the flour is fully incorporated, then add the eggs, sour cream, and vanilla. Do not overmix — stir just until smooth.
Pour the batter into the prepared pan and spread it to the edges with an offset spatula. The batter will be thin. Bake for 18 to 22 minutes, until the center is set and a toothpick comes out clean.
Making and Pouring the Frosting
Start the frosting about 5 minutes before the cake comes out of the oven so it is ready to pour while the cake is still warm. Bring the butter, milk, and cocoa to a boil, remove from heat, and whisk in the powdered sugar and vanilla until completely smooth.
Pour the hot frosting over the warm cake immediately and use an offset spatula or the back of a spoon to spread it to all four corners. Add pecans to the frosting in the pan, or sprinkle them on top after pouring. The frosting will set as it cools to room temperature, forming that distinctive fudge-like top layer.
Cooling and Cutting
Let the cake cool completely in the pan before cutting — at least 1 hour at room temperature. The frosting needs this time to firm up.
Cutting too early will cause the frosting to drag and tear. Use a sharp knife and wipe it clean between cuts for the neatest squares.
Variations and Substitutions
Buttermilk Instead of Sour Cream
Many older Texas sheet cake recipes call for buttermilk in place of sour cream. Use the same volume (1/2 cup) and the result will be slightly less rich but still tender. The tang of buttermilk also pairs well with the deep cocoa flavor.
Without Pecans
Pecans are traditional but entirely optional. The cake is equally good without them. Walnuts work as a substitute, or the frosting can be left plain for a smoother texture that appeals to nut-free households.
Adding Espresso Powder
Stirring 1 teaspoon of instant espresso powder into the hot cocoa mixture deepens the chocolate flavor without making the cake taste like coffee. This is a small addition that makes a noticeable difference.
Storage and Serving
Texas sheet cake keeps well covered at room temperature for up to 3 days. The frosting acts as a protective layer over the top of the cake, keeping the crumb moist. Cover the pan tightly with plastic wrap or aluminum foil.
For longer storage, refrigerate for up to 5 days. Bring individual slices to room temperature before serving — cold frosting loses some of its fudgy quality. The cake also freezes well: cut into squares, freeze individually on a sheet pan, then transfer to a zip-top bag for up to 2 months.
The History of Texas Sheet Cake
Texas sheet cake has appeared in church cookbooks and community fundraiser collections across the American South since at least the 1950s. The “Texas” name most likely refers to the size — a big, no-fuss cake built to feed the kind of crowds that show up at church potlucks, family reunions, and school bake sales.
The recipe does not appear to have a single verified origin, but variations show up consistently in Texas Junior League cookbooks from the 1960s and 1970s. Lady Bird Johnson is often cited in connection with a similar recipe, though food historians note the attribution is difficult to verify. What is certain is that the recipe spread through handwritten recipe cards and community cookbooks long before it appeared in print, which is characteristic of genuinely beloved American home cooking.
Find the complete ingredient list, serving size, and nutritional information in the recipe card below.
Texas Sheet Cake
A classic Southern chocolate sheet cake with a hot-poured fudge frosting that sets into a crackly, fudgy layer. Feeds a crowd and keeps well for days.
Ingredients
- 2 cups all-purpose flour
- 2 cups granulated sugar
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 1 cup unsalted butter
- 1 cup water
- 1/4 cup unsweetened cocoa powder
- 2 large eggs
- 1/2 cup sour cream
- 1 teaspoon vanilla extract
- 1/2 cup unsalted butter (frosting)
- 6 tablespoons whole milk
- 1/4 cup unsweetened cocoa powder (frosting)
- 3 1/2 cups powdered sugar, sifted
- 1 teaspoon vanilla extract (frosting)
- 1 cup chopped pecans (optional)
Instructions
- Preheat oven to 350 degrees F. Grease and flour an 18x13-inch half-sheet pan.
- Whisk flour, sugar, baking soda, and salt together in a large bowl.
- In a medium saucepan, combine butter, water, and cocoa powder over medium heat. Bring to a boil, stirring constantly.
- Pour the hot cocoa mixture over the dry ingredients and stir to combine.
- Add eggs, sour cream, and vanilla extract. Stir until smooth.
- Pour batter into the prepared pan and spread to the edges.
- Bake for 18 to 22 minutes, until a toothpick inserted in the center comes out clean.
- About 5 minutes before the cake is done, make the frosting: combine butter, milk, and cocoa in a saucepan over medium heat. Bring to a boil, stirring.
- Remove frosting from heat. Whisk in powdered sugar and vanilla until smooth. Stir in pecans if using.
- Pour hot frosting over the warm cake immediately and spread to the edges.
- Allow the cake to cool completely in the pan, at least 1 hour, before cutting and serving.
Notes
Buttermilk (1/2 cup) can be substituted for sour cream with similar results.
For a deeper chocolate flavor, add 1 teaspoon instant espresso powder to the cocoa mixture.
Store covered at room temperature for up to 3 days, or refrigerate for up to 5 days.
Freeze individual squares for up to 2 months.
Nutrition Information:
Yield:
24Serving Size:
1 squareAmount Per Serving: Calories: 320Total Fat: 16gSaturated Fat: 8gTrans Fat: 0gUnsaturated Fat: 6gCholesterol: 55mgSodium: 140mgCarbohydrates: 44gFiber: 1gSugar: 33gProtein: 3g
Frequently Asked Questions
Can Texas sheet cake be made ahead of time?
Yes, and it is actually better the next day. The frosting continues to set overnight, and the flavors develop further as the cake rests. Bake the day before and cover the pan tightly at room temperature. Slice just before serving.
Why is my Texas sheet cake dry?
Overbaking is the most common cause. At 350 degrees F in a half-sheet pan, the cake should be done in 18 to 22 minutes. Check at 18 minutes — the center should be just set and the edges should be pulling away slightly from the pan. A dry cake can also result from measuring flour by scooping rather than spooning and leveling, which packs too much flour into the cup.
What size pan is best for Texas sheet cake?
An 18×13-inch half-sheet pan is the standard and produces the best result — thin cake, ideal frosting ratio, and even baking. A 15×10-inch jelly roll pan also works but produces a thicker cake that needs a few extra minutes in the oven. A 9×13-inch pan will result in a much thicker, less characteristic cake.
Can this cake be frozen?
Yes. Let the cake cool completely and the frosting set fully, then cut into squares and freeze on a parchment-lined sheet pan. Transfer to a freezer-safe bag or container once solid. Thaw individual squares at room temperature for 30 to 45 minutes before serving.
How does sour cream affect the texture?
Sour cream adds fat and acid to the batter. The fat keeps the crumb tender and moist, and the acid reacts with baking soda to provide a small amount of lift. It also adds a subtle tang that balances the sweetness of the frosting. Whole-milk Greek yogurt is the closest substitute and works well in a 1:1 ratio.
Conclusion
Texas sheet cake delivers everything a crowd-pleasing dessert should: deep chocolate flavor, a fudgy frosting that sets into a crackly top, and enough slices to feed a room. Whether served at a potluck, a birthday dinner, or a weeknight when something rich is in order, this recipe earns its place as a permanent fixture in any home baker’s rotation.
