Storage, Freezing & Make-Ahead
Make-Ahead: The cake can be baked and frosted a day in advance. Store it covered at room temperature or in the refrigerator. The flavor actually improves as it sits, becoming deeper and more fudgy. If refrigerating, bring it to room temperature before serving for the best flavor and texture, or enjoy it cold for a firmer, fudge-like frosting. You can also bake the cake a day ahead, let it cool, and then make the frosting fresh and pour it over just before serving—simply reheat the cake slightly in a warm oven if you want the frosting to adhere in the traditional way.
Storing Leftovers: Cover the pan tightly with plastic wrap or transfer pieces to an airtight container. The cake can be stored at room temperature for up to 3 days or in the refrigerator for up to 5 days. The frosting will retain its glossy finish, and the cake will stay moist. If refrigerated, let it sit out for about 15 minutes before serving to take the chill off.
Freezing: Texas Sheet Cake freezes beautifully. For the best results, freeze the unfrosted cake. Wrap the completely cooled cake layer (in the pan or removed) tightly in plastic wrap and then foil. Freeze for up to 3 months. When ready to serve, thaw at room temperature, make the frosting fresh, and pour it over the cake. You can also freeze the frosted cake; the frosting may crack slightly upon thawing, but it will still be delicious. Cut the frosted cake into squares and place them in a single layer in a freezer-safe container with parchment between layers. Thaw in the refrigerator or at room temperature. A quick reheat of a frozen square in the microwave for 20 seconds makes it taste freshly baked.
Frequently Asked Questions
Can I make this cake in a 9×13-inch pan instead of a sheet pan?
Yes, a 9×13-inch pan works well. The cake will be much thicker, more like a traditional layer cake in height. Increase the baking time to about 35–40 minutes, until a toothpick inserted in the center comes out clean. The frosting amount will still be sufficient, but you’ll have a thicker layer on top. The cake will be less “sheet cake” and more like a frosted chocolate cake, which is also wonderful. The thin cake in the half-sheet pan is the classic, but a 9×13 is a perfectly acceptable alternative for smaller gatherings.
What if I don’t have buttermilk or sour cream?
You can make a quick substitute: place 1 tablespoon of white vinegar or lemon juice in a liquid measuring cup, then add enough whole milk to make 1 cup. Let it sit for 5–10 minutes until slightly thickened and curdled. Use ½ cup of this for the cake. Plain full-fat Greek yogurt is also a great substitute. The acidity is important for the leavening reaction and for that subtle tang that balances the sweetness.
Can I make this cake without eggs?
The cake relies on eggs for structure and tenderness. You can substitute the 2 eggs with ½ cup of unsweetened applesauce or 2 flax eggs (2 tablespoons ground flaxseed mixed with 5 tablespoons water, let sit for 5 minutes). The texture will be slightly denser and more fudgy, but still delicious. The frosting is naturally egg-free, so no changes are needed there.
My frosting turned out grainy or separated—what happened?
A grainy frosting can occur if the powdered sugar wasn’t sifted, if the butter mixture was too hot when the sugar was added, or if the frosting was overmixed. Sift the sugar, let the butter mixture cool slightly after boiling, and whisk gently until smooth. If the frosting separates (the butter pools on top), it may have been heated too much or the sugar didn’t emulsify properly. To rescue it, whisk vigorously until it comes back together, or add a tablespoon of warm milk and whisk. If all else fails, you can blend it with an immersion blender to re-emulsify, though the texture may be slightly different.
Can I make this cake gluten-free?
Yes, use a high-quality 1:1 gluten-free flour blend (like Bob’s Red Mill or King Arthur) that contains xanthan gum. The rest of the ingredients are naturally gluten-free. The cake may be slightly more crumbly, but the flavor will be just as delicious. Ensure your cocoa powder and other ingredients are certified gluten-free if you’re baking for someone with celiac disease.
Texas Sheet Cake
The legendary, thin, moist chocolate cake with a warm, fudgy pecan frosting poured over the top. Quick, easy, and feeds a crowd—this is the ultimate potluck and family gathering dessert.
Prep Time:
20 minutes
Cook Time:
18–22 minutes
Cool Time:
1–2 hours
Total Time:
About 1 hour 40 minutes
Servings:
24 squares
Ingredients
For the Cake:
- 1 cup (2 sticks) unsalted butter
- ¼ cup unsweetened natural cocoa powder
- 1 cup water
- 2 cups all-purpose flour, spooned and leveled
- 2 cups granulated sugar
- 1 teaspoon baking soda
- ½ teaspoon salt
- ½ teaspoon ground cinnamon
- ½ cup sour cream or buttermilk, at room temperature
- 2 large eggs, at room temperature
- 1 teaspoon vanilla extract
For the Frosting:
- ½ cup (1 stick) unsalted butter
- 3 tablespoons unsweetened cocoa powder
- 5–6 tablespoons whole milk or half-and-half
- 3½ cups powdered sugar, sifted
- 1 teaspoon vanilla extract
- 1 cup chopped pecans, toasted if desired
Instructions
- Preheat oven to 350°F (175°C). Grease a 13×18-inch half-sheet pan. Dust lightly with flour or line with parchment.
- Make the cake: In a large saucepan, combine butter, cocoa, and water. Bring to a gentle boil, stirring, until butter melts. Remove from heat and let cool for 2–3 minutes.
- In a separate bowl, whisk together flour, sugar, baking soda, salt, and cinnamon. Gradually stir the dry ingredients into the warm butter mixture until smooth.
- Beat in eggs one at a time, then stir in sour cream (or buttermilk) and vanilla. Whisk until the batter is smooth and thin. Pour into the prepared pan and spread evenly.
- Bake for 18–22 minutes, until a toothpick inserted in the center comes out clean. Do not overbake.
- While the cake bakes, make the frosting: In a medium saucepan, combine butter, cocoa, and 5 tablespoons milk. Bring to a gentle boil, stirring, then remove from heat. Add the sifted powdered sugar and vanilla; whisk until smooth and glossy. Stir in the pecans. Add an extra tablespoon of milk if the frosting is too thick to pour.
- As soon as the cake comes out of the oven, pour the warm frosting over the hot cake. Use a spatula to gently spread it evenly to the edges. Let the cake cool completely in the pan on a wire rack (1–2 hours), allowing the frosting to set. Cut into squares and serve.
Notes
- For the classic thin cake, use a half-sheet pan (13×18 inches). A 9×13-inch pan will produce a thicker cake; increase baking time to 35–40 minutes.
- Toasting the pecans enhances their flavor: bake at 350°F for 5–7 minutes until fragrant. Cool before adding to the frosting.
- Store covered at room temperature for up to 3 days, or refrigerate for up to 5 days. The unfrosted cake freezes well for up to 3 months.
- Substitute brewed coffee for the water to intensify the chocolate flavor.
This Texas Sheet Cake is more than a recipe—it’s a piece of Southern heritage, a cake that has brought people together for generations. With its moist, tender crumb and that irresistible, fudgy pecan frosting, it’s a dessert that never fails to bring smiles and requests for the recipe. Bake one for your next gathering, and discover why this humble sheet cake has earned its legendary status.