White Texas Sheet Cake (Vanilla White Cake Recipe From Scratch)

This white Texas sheet cake is soft, tender, and incredibly moist, with rich vanilla flavor and a perfect sour cream icing poured right over the top. Since it’s baked in a sheet pan, it comes together quickly, feeds a crowd easily, and gives you the perfect cake-to-icing ratio in every bite. It’s the kind of classic homemade cake that's ideal for potlucks, holidays, family gatherings, or anytime you want an easy dessert that makes everyone want seconds.

Why You'll Love This White Texas Sheet Cake

Growing up, my mom made classic Texas sheet cake for my birthday every year, so it’s always been one of those desserts that feels extra nostalgic to me. My wife has carried on that tradition, and this year she made a white Texas sheet cake version instead. It was honestly one of my favorite cakes I've eaten, so I had to share it with you! It still has everything that makes a Texas sheet cake so good, but with a rich vanilla flavor that makes it feel a little different while still keeping that same classic comfort.

What makes this white Texas sheet cake so good is how simple and dependable it is. The sour cream keeps the crumb soft, plush, and moist, the vanilla flavor really comes through, and the icing gives every bite that creamy melt-in-your-mouth finish that makes sheet cake so hard to stop eating. It’s rich without being too heavy and sweet without going over the top.

It’s also one of those desserts that’s great for feeding a crowd without feeling plain or boring. It travels well, slices easily, and tastes just as good the next day, which makes it perfect for parties, holidays, potlucks, and family dinners.

Ingredients You'll Need

For the Cake:

• 1 cup unsalted butter
• 1 cup water
• 2¼ cups all-purpose flour
• 2 cups sugar
• ½ teaspoon salt
• 1 teaspoon baking soda
• 2 teaspoon vanilla extract
• ½ cup sour cream
• 2 large eggs

For the Icing:

• 1 cup unsalted butter
• 4½ cups powdered sugar
• Pinch of salt
• ½ cup sour cream
• 2 teaspoon vanilla extract

How To Make White Texas Sheet Cake

Step 1: Prep the Pan and Oven

Preheat the oven to 350°F (175°C). Line a rimmed half sheet pan with parchment paper and lightly spray it with nonstick spray.

Step 2: Melt the Butter and Water

In a medium saucepan, combine the butter and water over low to medium heat. Melt gently, making sure the mixture does not boil.

Step 3: Mix the Dry Ingredients

In a large bowl, sift together the flour, sugar, salt, and baking soda.

Step 4: Make the Batter

Pour the warm butter-water mixture into the dry ingredients and stir until combined.

Add the vanilla, sour cream, and eggs, then mix until the batter is smooth and lump-free.

Step 5: Bake

Pour the batter evenly into the prepared pan. Smooth out the top with a rubber spatula; I like to make a swirl design down the middle.

Bake for 15–20 minutes, or until the internal temperature reaches 205°F and the cake is set. Carefully turn the cake out onto a flat cake plate or leave it in the pan to cool completely before icing.

Step 6: Start the Icing Base

Melt the butter, then mix in half of the powdered sugar, stirring or whisking until smooth.

Step 7: Finish the Icing

Add the sour cream, salt, and vanilla, mixing until fully combined. Add the remaining powdered sugar and whisk until the icing is smooth, glossy, and thick but pourable. It should resemble a loose ganache.

Step 8: Ice the Cake

Pour or spread the icing over the cooled cake, starting in the center and gently working outward so it naturally spreads to the edges.

Expert Tips To Make The Best White Texas Sheet Cake

• Melt the butter mixture gently instead of letting it boil hard. Keeping the heat lower helps the cake stay soft and tender, while too much heat can affect the final texture and make it a little less delicate.
• Sift the dry ingredients before mixing if you can. It helps break up any lumps and gives you a smoother batter, which makes the finished cake bake up lighter and more even.
• Use full-fat sour cream for the best flavor and texture. It adds the richness and moisture that give this white Texas sheet cake such a soft, plush crumb and helps keep it from drying out.
• Watch the bake time closely. Since this is a thinner sheet cake, it can go from perfectly baked to overdone pretty quickly. Pull it from the oven as soon as the center is set and a toothpick comes out clean.
• Let the cake cool before adding the icing. If the cake is too hot, the icing can melt down into it too much and lose that creamy layer on top. Cooling it first helps the frosting sit nicely on the surface instead.
• Adjust the icing until the consistency looks right to you. If you want a thicker icing, add powdered sugar a little at a time until it reaches the texture you like. That way you can make it perfectly spreadable without overdoing it.

White Texas Sheet Cake FAQs

Can I leave white Texas sheet cake in the pan instead of turning it out?

Yes, absolutely. In fact, a lot of people serve Texas sheet cake straight from the pan. It’s one of the easiest ways to make it for potlucks, holidays, and family gatherings since it travels well and is easy to slice and serve.

How should I store white Texas sheet cake?

Cover the cake tightly and store it at room temperature for up to 2 days, or in the refrigerator for up to 5 days. If you refrigerate it, let it sit out for a little while before serving so the cake and icing can soften back up a bit.

Can I freeze white Texas sheet cake?

Yes, this cake freezes really well. You can freeze it either unfrosted or frosted. Wrap the whole cake or individual slices tightly and freeze for up to 2 months. When you’re ready to serve it, let it thaw in the fridge or at room temperature until fully softened.

Why is it called a Texas sheet cake?

Texas sheet cake gets its name from the fact that it’s baked in a large pan and made to feed a crowd. It’s known for being thin, easy to slice, and topped with a poured frosting that spreads over the whole cake. Like a lot of classic Southern-style desserts, it’s simple, generous, and perfect for sharing.

What’s the difference between white Texas sheet cake and regular Texas sheet cake?

The biggest difference is the flavor. Classic Texas sheet cake is usually chocolate, while white Texas sheet cake has more of a rich vanilla flavor. The texture and style are very similar, with both baked in a sheet pan and topped with a poured icing.

Can I make white Texas sheet cake ahead of time?

Yes, this is a great make-ahead dessert. It holds up really well, and many people think it tastes even better the next day after the flavors have had time to settle. That makes it perfect for parties, holidays, and any event where you want to prep dessert ahead.

Why is my Texas sheet cake dry?

A dry Texas sheet cake usually means it was overbaked or too much flour was added. Since sheet cakes are thinner, they can bake quickly, so it helps to watch the oven closely and pull the cake as soon as it’s set. Measuring the flour carefully also makes a big difference.

Can I make white Texas sheet cake in a different pan?

You can, but the texture and bake time will change. Texas sheet cake is meant to be thin and baked in a sheet-style pan, which is part of what gives it its classic look and cake-to-icing ratio. If you use a smaller or deeper pan, you’ll likely need to adjust the baking time.

Why is my icing too thin or too thick?

If the icing feels too thin, add a little more powdered sugar until it thickens to the consistency you want. If it feels too thick, add a small splash of milk to loosen it. The goal is a creamy icing that spreads easily over the top of the cake without running right off.

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