Chocolate Texas Sheet Cake Recipe

I got into an argument at a covered dish dinner once about why this cake is called Texas sheet cake. After a funeral, no less. Which is probably the worst place to start an argument. But here we are. This older gentleman at my table said the name came from the size. You bake it in a giant sheet pan and feed half the neighborhood. Made total sense to me.

But the woman across from him shook her head. She said it was called Texas sheet cake because a woman from Dallas entered it in a baking contest in the 1960s. Won by a landslide. She even claimed it was documented in an old church newsletter somewhere. He said that sounded made up. She said he was the one making things up. And for about three minutes, two people who had never met before were going back and forth about the origins of a cake. At a funeral reception. Nobody stepped in because it was honestly more entertaining than anything else happening in that fellowship hall.

I still don’t know which one was right. But I know this cake lives up to every claim. A thin layer of fudgy chocolate cake that stretches across an entire 18 x 13-inch baking sheet. Covered in a glossy cocoa frosting you pour on while the cake is still warm. Crunchy toasted pecans scattered across the top. It feeds your whole crew and somehow gets even better the next day.

Scroll to bottom for printable recipe card.

Why You’ll Love Chocolate Texas Sheet Cake

This cake feeds twenty people and you don’t have to layer it. You don’t have to assemble it. You don’t even own a mixer? Doesn’t matter. The batter takes maybe ten minutes on the stove. The frosting is one saucepan. You melt everything, stir in your dry ingredients, pour it in, and the oven does the rest in under twenty minutes. That’s it. I am not exaggerating. No creaming butter and sugar, no alternating wet and dry, none of that. You stir the chocolate on the stove, fold in the rest, pour it into the pan, and walk away.

The frosting is why this cake has a reputation. You pour it on while the cake is still warm and it sinks into the surface as it sets up. So you get this layer between the cake and the frosting that’s half of each. My sister claims the cake tastes better on day two and I hate admitting she’s right about anything, but she’s right about this one. You can bake it the morning of a party, stick it in the fridge, and not think about it again until people show up.

Ingredients needed

• All-purpose flour
• Sugar
• Baking soda
• Salt
• Eggs
• Egg yolks
• Vanilla extract
• Sour cream
• Semisweet chocolate
• Unsalted butter
• Vegetable oil
• Water
• Dutch-processed cocoa powder
• Heavy cream
• Light corn syrup
• Confectioners’ sugar
• Toasted pecans

Ingredient Deep Dive

Sour Cream

Most Texas sheet cake recipes call for buttermilk. This one uses sour cream. I thought that was weird the first time I read it. It’s not weird. The sour cream makes the crumb denser and almost brownie-like in the middle, which I think is better than what buttermilk does. You get the tang and the tenderness but the texture is heavier in a way I like.

Use the full-fat kind. Low-fat sour cream has stabilizers in it and they do something strange in the batter. I don’t know the science. I just know the cake came out wrong the one time I tried it. Greek yogurt works in a pinch. 

Semisweet Chocolate and Cocoa

The semisweet bar melts into the butter and oil and gives you this heavy, dark base. All that cocoa-butter richness is coming from the bar. The cocoa powder is what actually makes it taste like chocolate all the way through the cake instead of just on top. I tried it once with only cocoa powder and once with only the bar and neither one was as good. You need both.

Use Dutch-processed cocoa. Natural cocoa runs sharper and more acidic and the frosting doesn’t taste right with it. Ghirardelli from the baking aisle is fine. People get weird about chocolate brands but this is a sheet cake. It’s going on a table at a barbecue. Save the Valrhona for something where it matters.

Light Corn Syrup

Look, I get it. Nobody gets excited about corn syrup. But those few tablespoons in the frosting give you that satin pour and a glossy top that still shines the next morning. You cannot get that texture any other way.

Without corn syrup, the sugar crystallizes. That’s a grainy, dull frosting that looks like it sat out overnight. Do not swap in honey or maple syrup. Honey sets up too firm and maple throws a flavor in there that has no business near the chocolate. Corn syrup does one thing, and it does it perfectly.

Toasted Pecans

You have to toast them. I won’t argue about this. Raw pecans are fine on their own but they taste like nothing on top of a chocolate cake. Throw them in a dry skillet or a 350-degree oven and in a few minutes the oils start coming out and that buttery smell hits. The whole kitchen smells like a candle store. That’s when you know they’re done.

Chop them. Don’t leave them in halves. The chopped pieces spread better and you get crunch in almost every bite instead of one giant pecan in one corner and nothing in the rest. Walnuts work if pecans aren’t your thing, but pecans are the right call on this one.

Step-by-Step Instructions for Making Chocolate Texas Sheet Cake

Step 1: Preheat your oven to 350 degrees F with the rack in the middle position. Grease an 18 x 13-inch baking sheet and set it aside.

In a large bowl, combine the flour, sugar, baking soda, and salt. Whisk until you can’t see any sugar clumps.

Add the flour to a large bowl with the sugar. Then the baking soda and salt. Stir. In a separate bowl, whisk the eggs and egg yolks with the vanilla extract and sour cream until blended. The sour cream makes it thicker than you’d expect. Set both bowls aside while you start the chocolate.

Step 2: Melt the chocolate mixture on the stove.

Grab a large saucepan and set it over medium heat. Add the semisweet chocolate with the butter and vegetable oil. Then the water and cocoa powder. Stir occasionally and let everything cook for 3 to 5 minutes. You’ll watch it go from a chunky mess to this glossy melted chocolate.

Oh man, that cocoa and butter scent is going to drift through the whole house. Take it off the heat once it’s smooth.

Step 3: Pour the chocolate mixture into the flour mixture and stir until combined. Add the egg mixture and stir until smooth.

The batter will look darker than most cake batters. Stir until there are no dry streaks. Then pour it into your greased baking sheet and spread evenly. It’s thinner than regular batter so it’ll spread easily. Just make sure it reaches all four corners. Those edges crisp up and you want cake covering every inch of that pan.

Step 4: Bake for 18 to 20 minutes and let the cake cool on a wire rack.

The cake is done when the center springs back if you press it lightly. Don’t overbake this one or it’ll dry out. The edges might pull slightly away from the sides. That’s normal. Give it about 5 minutes on the rack before you frost it. Not longer. You want the cake warm when the frosting goes on so it soaks into the top layer.

Step 5: Make the frosting while the cake cools.

Add the butter to a large saucepan with the heavy cream and cocoa powder. Then the corn syrup. Set it over medium heat and stir until it all melts together and goes smooth. Take it off the heat and whisk in the confectioners’ sugar and vanilla extract.

Whisk until there are no lumps. It’ll be thick but still pourable. This frosting sets fast so don’t let it sit in the pan too long.

Step 6: Spread the frosting over the warm cake and top with toasted pecans.

Pour the frosting onto the cake and spread to the edges with a spatula. It’ll look almost like a chocolate ganache going on. Scatter the toasted pecans across the top while the frosting is still soft so they stick. Let the cake cool to room temperature. Then move it to the fridge for about an hour. That hour lets the frosting firm up so you get clean slices.

PIN THIS RECIPE FOR LATER!

Pro-Tips & Technique

Pour the frosting over the cake while it’s still warm. Not hot out of the oven. Warm. If you frost it too hot, the frosting slides right off. Give the cake about 5 minutes on the wire rack first. Then pour the frosting on and spread it with a spatula. 

And don’t skip the hour in the fridge. The frosting needs that time to firm up or it’ll smear when you cut into it.

Serving & Pairing

A slice of this cake on its own is already enough. But a scoop of sea salt caramel truffle ice cream on top takes it to another level. The salty caramel against the fudgy chocolate is sooooo good. For drinks, I always pour a cold glass of whole milk with chocolate cake. But if you want something more fun, try a chocolate stout like Left Hand Milk Stout. For a non-alcoholic option, blend up a chocolate peanut butter smoothie and go all in on the chocolate.

This cake is the ending you want after a cookout. Throw some Cherry Dr. Pepper BBQ ribs on the grill and then bring out the sheet cake. Or serve it after a big bowl of lasagna soup on a cold night. Either way, it’s the right ending to that kind of meal.

FAQs & Troubleshooting

How do I store leftovers?

Cover the pan with foil or move slices to an airtight container. It’ll keep in the fridge for up to 4 days. The sour cream and oil in the batter keep it moist. Eat it cold or pop a slice in the microwave for about 15 seconds.

Can I freeze Texas sheet cake?

Once the frosting is set, cut it into portions and wrap each piece in plastic wrap. Stick them in a freezer bag. They’ll keep for up to 3 months. Thaw in the fridge overnight.

If you love this chocolate sheet cake, I’m sure you will love these dessert recipes too. Take a look at these recipes below:

• German Chocolate Layer Cake With Coconut Pecan Frosting – There is no doubt you’re going to be so happy with this recipe. 
• Pumpkin Apple Instant Pot Cake – I love making a cake in my Instant Pot, and this is so flavorful and easy. 
• Three Layer Apple Spice Cake – The cinnamon and apples make this cake beyond amazing. It’s one of my favorites. 
• Instant Pot Nutella Cake – This one only requires 2 ingredients, and you can easily make it in Instant Pot. It’s a winner all around.