Texas sheet cake is a classic American dessert known for its ultra-moist, fudgy chocolate crumb, baked in a large sheet pan and topped with a warm, glossy chocolate-pecan frosting that soaks into the cake as it sets. It’s a crowd-pleaser that’s simple to make with pantry staples, and the buttermilk in the batter ensures a tender, tangy crumb that balances the sweet frosting. This recipe delivers a reliably rich, chocolatey cake that’s perfect for potlucks, birthdays, or any time you need a big, satisfying dessert.
Ingredients
- For the cake:
- 2 cups (400 g) granulated sugar
- 2 cups (250 g) all-purpose flour
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 1 cup (2 sticks / 226 g) unsalted butter
- 1 cup (240 ml) water
- 1/4 cup (25 g) unsweetened cocoa powder (natural or Dutch-process)
- 1/2 cup (120 ml) buttermilk, at room temperature
- 2 large eggs, at room temperature
- 1 teaspoon vanilla extract
- For the frosting:
- 1/2 cup (1 stick / 113 g) unsalted butter
- 1/4 cup (25 g) unsweetened cocoa powder
- 6 tablespoons (90 ml) whole milk
- 3 1/2 cups (400 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 a 15x10x1-inch (38x25x2.5 cm) jelly-roll pan or a 9×13-inch (23×33 cm) baking pan. For easiest removal, line the bottom with parchment paper.
- In a large bowl, whisk together the sugar, flour, baking soda, and salt. Set aside.
- In a medium saucepan over medium heat, melt the butter. Add the water and cocoa powder, stirring until smooth. Bring the mixture to a gentle boil, then remove from heat immediately.
- Pour the hot chocolate mixture over the dry ingredients and stir until just combined. The batter will be thin.
- In a small bowl, beat the buttermilk, eggs, and vanilla together. Add to the batter and stir until fully incorporated, scraping the bottom of the bowl.
- 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. The cake should spring back lightly when touched.
- While the cake bakes, make the frosting. In a saucepan, melt the butter over medium heat. Add the cocoa powder and milk, stirring until smooth. Bring to a simmer, then remove from heat.
- Whisk in the powdered sugar and vanilla until smooth. If using nuts, stir them in now. The frosting should be pourable but not too thin.
- As soon as the cake comes out of the oven, pour the warm frosting over the hot cake. Spread it evenly with a spatula.
- Let the cake cool completely on a wire rack before slicing. The frosting will set as it cools.
Tips
- Use a jelly-roll pan for the classic thin texture. A 15×10-inch pan gives the traditional Texas sheet cake ratio of cake to frosting. A 9×13-inch pan will result in a thicker cake that needs a few extra minutes of baking time.
- Don’t overmix the batter. Once you add the wet ingredients, stir just until no streaks of flour remain. Overmixing can develop gluten and make the cake tough.
- Pour the frosting on the hot cake. This is key—the warm frosting soaks into the cake slightly, creating a fudgy top layer. If the cake cools completely, the frosting won’t spread as easily.
- Substitute for buttermilk: If you don’t have buttermilk, add 1 1/2 teaspoons of lemon juice or white vinegar to 1/2 cup of milk and let it sit for 5 minutes. This will approximate the tang and acidity.
Serving Suggestions
Serve Texas sheet cake at room temperature, cut into squares. It’s wonderful on its own, but a scoop of vanilla ice cream or a dollop of lightly sweetened whipped cream adds a nice contrast. For a more decadent touch, drizzle with a little chocolate sauce or sprinkle with flaky sea salt before serving.
Variations
- Chocolate-Peanut Butter: Substitute 1/2 cup of creamy peanut butter for 1/2 cup of the butter in the frosting. Stir it in with the vanilla.
- Mexican Chocolate: Add 1 teaspoon of ground cinnamon and a pinch of cayenne pepper to the dry ingredients for a subtle heat.
- Mocha: Replace the water in the cake with strong brewed coffee for a deeper chocolate flavor.
- Nut-Free: Simply omit the pecans or walnuts from the frosting. The cake is just as delicious without them.
Storage and Reheating
Store leftover Texas sheet cake in an airtight container at room temperature for up to 3 days. The frosting will remain soft and fudgy. For longer storage, refrigerate for up to 5 days, but bring to room temperature before serving. You can also freeze the cake (with or without frosting) for up to 3 months. Wrap tightly in plastic wrap and then foil. Thaw overnight in the refrigerator before serving. To reheat individual slices, microwave for 10–15 seconds to soften the frosting.
Frequently Asked Questions
Can I make this cake gluten-free? Yes, you can substitute a 1:1 gluten-free flour blend for the all-purpose flour. The texture may be slightly more delicate, so handle with care.
Why is my cake dry? Overbaking is the most common cause. Start checking at 20 minutes. Also, make sure your buttermilk and eggs are at room temperature so they incorporate evenly.
Can I use a different pan? Yes, you can use a 9×13-inch pan, but the cake will be thicker. Increase the baking time to 30–35 minutes. You could also use a 12-cup bundt pan, but adjust the baking time to 35–40 minutes and check for doneness.
Do I have to pour the frosting on hot? It’s traditional, but you can also let the cake cool completely and then spread the frosting at room temperature. The frosting will be thicker and won’t soak in as much, giving a different but still delicious texture.
Can I make the frosting ahead? Yes, you can make the frosting up to 2 days ahead and store it in the refrigerator. Reheat gently in a saucepan or microwave until pourable before using.
What if I don’t have buttermilk? As mentioned above, you can make a quick substitute with milk and lemon juice or vinegar. This will work in a pinch, but the cake may be slightly less tender.
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