Vanilla Sheet Cake

Name: Vanilla Sheet Cake
Prep time: 20 min
Cook time: PT-497495H31M15S
Cuisine: American
Ingredients: 1 ⅔ cups (235g) all-purpose flour; 1 ½ teaspoon baking powder; ¼ teaspoon baking soda; 1 ¼ cups (250g) granulated sugar; ½ teaspoon salt; 1 large egg, at room temperature; 2 large egg whites, at room temperature; 6 tablespoon (84g) unsalted butter, melted; 3 tablespoon (45ml) sunflower oil; ½ cup (120ml) full fat sour cream; 1 ½ teaspoon (7ml) pure vanilla extract; ⅔ cup (160ml) whole milk, warmed

By:

jeremy

Published:

October 2, 2026

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Vanilla Sheet Cake is a delightful treat that’s hard to resist. This cake is incredibly moist and fluffy, making it the perfect canvas for celebration. It boasts a rich vanilla flavor—comforting yet sophisticated. Whether it’s for a birthday party, a casual gathering, or just a special dessert to enjoy with your afternoon tea, this sheet cake will undoubtedly be the star of the show.

I remember the first time I stumbled upon this recipe. I was hosting a gathering and needed something simple yet impressive. After taking just one bite, I felt compelled to share it with everyone. Not only is this Vanilla Sheet Cake a breeze to whip up (the prep time is a mere 20 minutes), but its tender crumb and buttery flavor truly elevate any occasion. I can’t wait for you to try it!

Why You’ll Love This Recipe

Simple & Quick: Takes just 20 minutes of prep time; perfect for any last-minute dessert need.
Irresistible Flavor: With the creamy tang from sour cream and warm notes of vanilla, every bite is a flavor bomb.
Eye-Catching Appeal: The light golden hue topped with frosting makes it visually stunning—ideal for gatherings.
Flexible Serving: Great for any occasion—whether it’s a birthday party, a picnic, or just a cozy weekend treat.
Diet-Friendly Options: Easily adaptable for various dietary preferences—just let your creativity flow!

Ingredients You’ll Need

1 ⅔ cups all-purpose flour: This forms the backbone of your cake. For a gluten-free option, you can substitute with a 1-to-1 gluten-free flour blend.
1 ½ teaspoon baking powder: This is essential for giving the cake its rise. Ensure it’s fresh for the best results.
¼ teaspoon baking soda: This works alongside baking powder to achieve that perfect fluffy texture.
1 ¼ cups granulated sugar: Sweetness is key! Using finely granulated sugar helps it dissolve better in the batter.
½ teaspoon salt: This balances sweetness and enhances the overall flavor.
1 large egg, at room temperature: Eggs provide structure. Room temperature ensures even mixing.
2 large egg whites, at room temperature: Extra whites help lighten the cake’s texture.
6 tablespoons unsalted butter, melted: Adds moisture and richness. Don’t substitute with salted butter here, as it can throw off the flavor balance.
3 tablespoons sunflower oil: This keeps the cake moist and tender. You can swap with canola or vegetable oil if needed.
½ cup full fat sour cream: This is a secret ingredient that adds moisture and a subtle tang.
1 ½ teaspoons pure vanilla extract: Choose high-quality vanilla for the best flavor. Avoid imitation extracts if you can.
⅔ cup whole milk, warmed: This helps to achieve the right batter consistency. Make sure to warm it gently, so it doesn’t cook the eggs when combined.

How to Make Vanilla Sheet Cake

Preheat the Oven: Start by preheating your oven to 350°F. Prepare a 13×9-inch metal baking pan by lining it with parchment paper, allowing a 2-inch overhang on the long sides for easy removal.
Combine Dry Ingredients: In a large bowl, sift together 1 ⅔ cups all-purpose flour, 1 ½ teaspoons baking powder, and ¼ teaspoon baking soda using a fine mesh sieve. Add 1 ¼ cups granulated sugar and ½ teaspoon salt, whisking until well mixed.
Combine Wet Ingredients: In a medium bowl, whisk together 1 large egg, 2 large egg whites, 6 tablespoons melted unsalted butter, 3 tablespoons sunflower oil, ½ cup sour cream, and 1 ½ teaspoons pure vanilla extract. Mix until fully blended.
Warm the Milk: Heat ⅔ cup whole milk in a heatproof jug in the microwave for about 1 minute, or until steaming but not boiling.
Mix the Batter: Make a well in the center of your dry mixture and pour in the wet ingredients. Using a handheld electric mixer on medium-low speed, blend until combined. The batter may be thick and somewhat dry. Gradually add the warm milk in two stages; this helps prevent clumping and ensures a smooth batter.
Bake: Pour the batter into your prepared pan and tap it gently on the countertop to allow any large air bubbles to rise. Bake for approximately 23-27 minutes. The cake is done when it springs back when gently pressed, and a skewer inserted into the center comes out clean. Allow cooling in the pan for 15 minutes before running a knife around the edges and gently transferring the cake to a wire rack to cool completely.
Prepare Frosting: While your cake cools, whip up either my Hybrid American Buttercream or Vanilla Whipped Ganache Frosting (both are divine!).
Assemble the Cake: Once the cake is completely cool, spread your frosting of choice over the top using a large offset spatula or pipe it on for an eye-catching finish.

Storing & Reheating

Store any leftover Vanilla Sheet Cake at room temperature in an airtight container for up to three days. If you need to keep it longer, refrigerate for up to a week, but be sure to cover it well to maintain moisture. You can also freeze slices for up to three months; wrap them tightly in plastic wrap followed by aluminum foil. When ready to enjoy, simply thaw at room temperature or warm individual slices in the microwave for about 10-15 seconds.

Chef’s Helpful Tips

Avoid Overmixing: When incorporating the flour, mix until just combined to prevent a dense cake.
Egg Temperature Matters: Ensure your eggs are at room temperature for even mixing, which aids in achieving a tender cake.
Don’t Skip the Cooling Stage: Allowing the cake to cool completely prevents the frosting from melting and ensures a beautiful finish.
Experiment with Flavors: Feel free to play with flavored extracts, such as almond or lemon, for a unique twist on the classic Vanilla Sheet Cake.
Perfect Your Frosting: If your buttercream is too thick, add a splash of milk to reach the desired consistency.

Vanilla Sheet Cake encapsulates the simple joy of baking with its tender texture and delicious flavor, making it a must-try recipe. With its versatile nature, you can personalize it with different frostings and toppings. Don’t hesitate to add your own spin to it—this cake invites creativity! Grab your apron and enjoy the delightful process of creating something special that will light up any table.

Recipe FAQs

Can I make this cake ahead of time?

Absolutely! You can bake the Vanilla Sheet Cake a day in advance. Just store it properly, as noted above, and frost it closer to serving time for the best taste.

What’s the best way to frost this cake?

Using a large offset spatula makes it easier to spread frosting evenly. For more decorative piping, a piping bag with a star tip works wonders and can really elevate the cake’s appearance.

Can I use almond flour instead of all-purpose flour?

While almond flour can be used for gluten-free options, it doesn’t behave the same way as all-purpose flour. You may need to adjust the ratios or find an almond flour-specific recipe for the best results.

Why is sour cream used in this recipe?

Sour cream adds moisture, creating a dense yet fluffy cake texture. It also contributes a subtle tanginess, which enhances the vanilla flavor beautifully.