Texas sheet cake is a beloved American dessert known for its thin, tender chocolate cake baked in a large sheet pan and topped with a warm, pourable chocolate fudge frosting that soaks slightly into the cake. Its origins are debated, but most food historians agree it became popular in the mid-20th century in Texas, likely as a community and potluck staple. This recipe delivers the classic moist crumb and glossy icing that make it a crowd-pleaser, with simple pantry ingredients and easy one-bowl mixing.
Ingredients
- 2 cups (250 g) all-purpose flour
- 2 cups (400 g) granulated sugar
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 1/2 cup (115 g) unsalted butter
- 1/2 cup (120 ml) vegetable oil
- 1/2 cup (40 g) unsweetened cocoa powder
- 1 cup (240 ml) water
- 2 large eggs, at room temperature
- 1/2 cup (120 ml) buttermilk
- 1 teaspoon vanilla extract
- For the frosting:
- 1/2 cup (115 g) unsalted butter
- 1/4 cup (20 g) unsweetened cocoa powder
- 1/4 cup (60 ml) milk
- 3 cups (360 g) powdered sugar, sifted
- 1 teaspoon vanilla extract
- 1 cup (120 g) chopped pecans or walnuts (optional)
Instructions
- Preheat your oven to 350°F (175°C). Grease an 18×13-inch (46×33 cm) sheet pan (half-sheet pan) with butter or cooking spray.
- In a large bowl, whisk together the flour, sugar, baking soda, and salt. Set aside.
- In a medium saucepan, combine the butter, oil, cocoa powder, and water. Heat over medium heat, stirring occasionally, until the butter is melted and the mixture is smooth. Do not boil.
- Pour the hot chocolate mixture over the dry ingredients and stir with a wooden spoon until just combined. The batter will be thin.
- In a small bowl, lightly beat the eggs, then add the buttermilk and vanilla. Stir into the batter until fully incorporated. The batter will be smooth and pourable.
- Pour the batter into the prepared pan and spread evenly. Bake for 20–25 minutes, or until a toothpick inserted in the center comes out clean or with a few moist crumbs. The cake should spring back when lightly touched.
- While the cake bakes, make the frosting. In a medium saucepan, melt the butter over medium heat. Add the cocoa powder and milk, and whisk until smooth. Bring to a gentle simmer, then remove from heat.
- Gradually whisk in the powdered sugar and vanilla until the frosting is smooth and glossy. If using nuts, stir them in now.
- Pour the warm frosting over the hot cake (right out of the oven) and spread evenly with a spatula. The frosting will set as it cools.
- Let the cake cool completely on a wire rack before cutting into squares. Serve at room temperature.
Tips
- Use a half-sheet pan: An 18×13-inch pan is standard. If you only have a 9×13-inch pan, halve the recipe or expect a thicker cake that needs extra baking time (about 30–35 minutes).
- Don’t overmix: Stir just until the batter is smooth. Overmixing develops gluten and can make the cake tough.
- Pour frosting on hot cake: The warm frosting soaks into the hot cake, creating the signature fudgy top. If the cake has cooled, the frosting won’t spread as easily.
- Buttermilk substitute: If you don’t have buttermilk, add 1 tablespoon of lemon juice or white vinegar to 1/2 cup of milk and let sit for 5 minutes.
Serving Suggestions
Serve Texas sheet cake as a casual dessert at potlucks, cookouts, or birthday parties. Cut into squares and enjoy with a glass of cold milk or a scoop of vanilla ice cream. For a richer treat, top with a dollop of whipped cream or a drizzle of caramel sauce.
Variations
- Chocolate-Peanut Butter: Swirl 1/2 cup of creamy peanut butter into the frosting before pouring.
- Mexican Chocolate: Add 1 teaspoon of ground cinnamon and a pinch of cayenne pepper to the dry ingredients.
- Mint Chocolate: Add 1/2 teaspoon of peppermint extract to the frosting and sprinkle crushed candy canes on top.
- Gluten-Free: Substitute the all-purpose flour with a 1:1 gluten-free flour blend. The texture may be slightly more crumbly.
Storage and Reheating
Store leftover cake in an airtight container at room temperature for up to 4 days. For longer storage, refrigerate for up to a week, but bring to room temperature before serving. To freeze, wrap individual squares in plastic wrap and place in a freezer-safe bag for up to 3 months. Thaw overnight in the refrigerator. To reheat, microwave a square for 15–20 seconds to soften the frosting.
Frequently Asked Questions
Can I use Dutch-processed cocoa instead of regular? Yes, but the cake may rise slightly less since Dutch-processed cocoa is less acidic. If using Dutch-processed, you can add 1/4 teaspoon of baking powder to help with leavening.
Why is my frosting grainy? Grainy frosting usually results from not sifting the powdered sugar or from adding it too quickly. Sift the sugar and whisk slowly to ensure a smooth texture.
Can I make this cake ahead of time? Absolutely. Bake and frost the cake a day ahead, cover, and store at room temperature. The flavors meld and the cake stays moist.
What if I don’t have a sheet pan? Use a 9×13-inch pan, but reduce the recipe by half or adjust baking time. A 9×13 pan will yield a thicker cake that needs 30–35 minutes.
Is Texas sheet cake the same as chocolate sheet cake? Texas sheet cake is a specific version with buttermilk and a poured fudge frosting, often with pecans. Other chocolate sheet cakes may use different icings.
Can I use oil instead of butter in the frosting? Butter gives the best flavor and texture. Oil will make the frosting softer and less stable.
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