Texas Sheet Cake is a classic American dessert—a large, flat chocolate cake known for its fudgy texture and poured-on chocolate frosting. This version uses Coca-Cola in the batter, which adds a subtle caramel note and keeps the crumb exceptionally moist. The cola also reacts with the baking soda to help the cake rise, making it a genuinely reliable one-bowl recipe that feeds a crowd.
Ingredients
- 2 cups (400 g) granulated sugar
- 2 cups (250 g) all-purpose flour
- 1 cup (2 sticks, 226 g) unsalted butter
- 1 cup (240 ml) Coca-Cola (not diet)
- 3 tbsp (45 ml) unsweetened cocoa powder
- 1/2 cup (120 ml) buttermilk, at room temperature
- 2 large eggs, at room temperature
- 1 tsp (5 ml) vanilla extract
- 1 tsp (5 g) baking soda
- 1/2 tsp (3 g) salt
For the Frosting
- 1/2 cup (1 stick, 113 g) unsalted butter
- 1/4 cup (60 ml) Coca-Cola
- 3 tbsp (45 ml) unsweetened cocoa powder
- 4 cups (480 g) powdered sugar, sifted
- 1 tsp (5 ml) vanilla extract
- 1 cup (120 g) chopped pecans or walnuts (optional)
Instructions
- Preheat your oven to 350°F (175°C). Grease a 13×18-inch (half-sheet) jelly-roll pan with butter or nonstick spray.
- In a large mixing bowl, whisk together the sugar, flour, and salt. Set aside.
- In a medium saucepan over medium heat, melt the 1 cup butter. Add the 1 cup Coca-Cola and 3 tbsp cocoa powder; whisk until smooth and just simmering. Remove from heat.
- Pour the hot butter-cola mixture into the dry ingredients. Stir until just combined—do not overmix.
- In a small bowl, beat the eggs lightly, then add the buttermilk and vanilla. Stir into the batter until fully incorporated.
- Sprinkle the baking soda over the batter and stir in gently (the batter will foam slightly). Pour the batter into the prepared pan and spread evenly.
- Bake for 20–25 minutes, until a toothpick inserted in the center comes out with a few moist crumbs. Do not overbake—the cake should be moist.
- While the cake bakes, make the frosting: in a clean saucepan, melt the 1/2 cup butter over medium heat. Stir in the 1/4 cup Coca-Cola and 3 tbsp cocoa powder; bring to a simmer, then remove from heat.
- Whisk in the powdered sugar and vanilla until smooth. If the frosting is too thick, add 1–2 tsp of milk; if too thin, add a little more powdered sugar.
- Pour the warm frosting over the cake as soon as it comes out of the oven. Spread evenly; the frosting will set as it cools. If using nuts, sprinkle them over the top immediately.
- Let the cake cool completely on a wire rack before cutting into squares.
Tips
- Use full-sugar Coke: Diet or zero-sugar colas don’t have the same sugar content, which affects both sweetness and texture. The sugar in regular Coke helps the cake brown and the frosting set properly.
- Don’t skip the buttermilk: The acidity in buttermilk activates the baking soda, giving the cake its rise. If you don’t have buttermilk, add 1 tbsp of lemon juice or vinegar to 1/2 cup of milk and let it sit for 5 minutes.
- Pour frosting on a warm cake: The warm frosting soaks slightly into the top of the cake, creating that signature fudgy layer. If the cake has cooled completely, the frosting won’t spread as smoothly.
- Use a half-sheet pan: A 13×18-inch pan gives the classic thin cake. If you only have a 9×13-inch pan, the cake will be thicker—bake for 30–35 minutes and check with a toothpick.
Serving Suggestions
Serve squares of Texas Sheet Cake at room temperature or slightly warm. It’s delicious on its own, but a scoop of vanilla ice cream or a dollop of whipped cream balances the rich chocolate. For a Southern-style touch, serve with a glass of cold milk or sweet tea. This cake is ideal for potlucks, birthdays, and any gathering where you need to feed a dozen or more people.
Variations
- Chocolate Cola Cake: Use Dr Pepper or root beer instead of Coke for a different flavor profile—both work well.
- Add espresso powder: Stir 1 tsp of instant espresso powder into the cocoa for a deeper, mocha-like chocolate flavor.
- Make it a layer cake: Bake the batter in two 9-inch round pans (about 25–30 minutes) and double the frosting. You’ll get a taller, more formal dessert.
- Nut-free version: Omit the pecans entirely or substitute with toasted coconut flakes for a different texture.
Storage and Reheating
Store leftover cake in an airtight container at room temperature for up to 3 days. The frosting will stay soft and fudgy. For longer storage, refrigerate for up to 5 days—bring to room temperature before serving. To freeze, wrap the unfrosted or frosted cake tightly in plastic wrap and then foil; freeze for up to 3 months. Thaw overnight in the refrigerator. To reheat individual slices, microwave for 10–15 seconds to soften the frosting, or warm in a 300°F (150°C) oven for 5 minutes.
Frequently Asked Questions
Can I use diet Coke?
No—diet Coke lacks the sugar that helps the cake brown and the frosting set. The artificial sweetener can also leave a bitter aftertaste. Stick with regular Coke.
Why is my cake dry?
Overbaking is the most common cause. Start checking at 20 minutes; the cake should be just set and a toothpick should come out with moist crumbs. Also, be sure to measure flour correctly—spoon it into the cup and level off, rather than scooping directly.
Can I make this cake ahead of time?
Yes, you can bake the cake a day ahead, but don’t frost it until just before serving. The frosting is best when poured warm over the cake. If you need to assemble fully, do it the day you plan to serve—the cake will stay moist for 2 days at room temperature.
Can I use a different pan?
Yes, but adjust the baking time. A 9×13-inch pan will give a thicker cake that needs 30–35 minutes. A 10×15-inch jelly-roll pan is also fine—bake for 22–28 minutes. Always test with a toothpick.
Is the frosting supposed to be runny?
The warm frosting is pourable, but it thickens as it cools. If it’s too runny, let it cool for a few minutes before pouring. If it’s too thick, add a teaspoon of milk at a time until it reaches the right consistency.
Can I omit the nuts?
Absolutely. The nuts are optional and purely for texture. If you skip them, the frosting will be perfectly smooth.
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