Vanilla Sheet Cake

Author: Lana Published: 07/14/2026

Fluffy, sweet, and simply perfect Vanilla Sheet Cake is a timeless classic that’s so easy to whip up for birthdays, family dinners, or even as a base for a fun poke cake!

This straightforward, from-scratch vanilla sheet cake is all about delicious, fluffy cake without any stress. It’s a fantastic choice when you want a no-fuss, slice-and-serve dessert that pleases a crowd—perfect for birthday parties, potlucks, or just because. Made with simple, everyday pantry ingredients and topped with a quick vanilla buttercream, it nails that homemade flavor with zero hassle. Plus, it’s a wonderful base if you want to try your hand at a poke cake.

I’m sharing everything you need right here: a detailed list of ingredients, easy-to-follow baking steps, a luscious frosting recipe, plus handy tips on measuring, storing, and mixing up the flavors. The whole process takes about 15 minutes to prep, bakes for around 33 to 35 minutes, then cools for about an hour. You’ll end up with 12 generous slices, so there’s plenty to go around (total time, roughly 1 hour 50 minutes).

Uses simple ingredients and steps — perfect if you’re newer to baking or want something reliable.
Includes a quick recipe for vanilla buttercream so you can frost and decorate without hassle.
Offers tasty ideas for tweaks like citrus, berries, chocolate, or turning it into a poke cake.
Provides storage and make-ahead advice so your cake stays moist and fresh for your gathering.

Why This Cake Works

This vanilla sheet cake strikes the perfect balance between homemade taste and easy prep. If you want a trustworthy go-to that’s fast, flavorful, and super adaptable, here’s why this recipe deserves a spot in your dessert lineup:

Feeds a crowd: You’ll get about 12 neat slices from a 9×13 pan—ideal for parties, school events, or family gatherings.
Easy, pantry-friendly ingredients: No fancy or hard-to-find items here. Just everyday staples you probably already have in your kitchen.
Consistently moist and fluffy: Thanks to a combo of oil and sour cream, the crumb stays tender without tasting overly sweet or store-bought.
Fast, tasty frosting: The vanilla buttercream whips up in minutes and doesn’t mind being spread or decorated by beginner bakers.
Super versatile: Use it as a poke cake base, fold in fresh berries, swap some flour for cocoa powder for chocolate, or switch up the frosting for every occasion.
Kid and party-friendly: The classic vanilla flavor with a sprinkle-topped finish makes it easy to dress up for birthdays, holidays, or classroom treats.
Easy to store and make ahead: Bake in advance, freeze unfrosted, or keep it at room temp for a few days—this cake holds up beautifully.
Reliable results every time: Follow key tips like using room-temp ingredients and measuring flour properly, and you’ll get perfect texture every bake.

In short, this vanilla sheet cake is your simple, crowd-pleasing, and highly adaptable dessert answer—classic vanilla flavor made easy for any day or special occasion.

Vanilla sheet cake is a go-to for feeding a crowd because you can cut lots of slices fast. Plus, swapping the sprinkles lets you match the theme of any celebration!
This cake is light, fluffy, and has just the right amount of sweetness and vanilla flavor, without the sugar overload some store-bought cakes have.
Made with pantry staples, this recipe is simple to mix up with no fancy ingredients or gadgets—way easier than you might think. Sure, box mixes are convenient, but homemade flavor like this is just as quick and far better.
The vanilla buttercream frosting is dreamy and comes together fast. Trust me, it’s so good you might be tempted to eat it by the spoonful before it even hits the cake!

Cake and Frosting Ingredients

2 ½ cups all-purpose flour (see note)
2 teaspoons baking powder
1 teaspoon baking soda
½ teaspoon salt
1 cup granulated sugar
3 large eggs at room temperature
½ cup vegetable oil (or melted butter)
½ cup sour cream at room temperature
2 teaspoons vanilla extract
1 cup milk at room temperature
4 cups powdered sugar
1 cup unsalted butter slightly melted
2 teaspoons vanilla extract
Rainbow sprinkles (optional)

How to Make the Cake

Bring refrigerated ingredients (eggs, sour cream, milk) to room temperature.
Preheat oven to 350°F and line a 9×13-inch pan with parchment paper; spray the parchment with nonstick cooking spray.
Whisk together 2½ cups all-purpose flour, 2 teaspoons baking powder, 1 teaspoon baking soda, and ½ teaspoon salt in a medium bowl.
In a large bowl, beat 1 cup granulated sugar, 3 large eggs, ½ cup vegetable oil (or melted butter), ½ cup sour cream, and 2 teaspoons vanilla extract on low speed until smooth and combined.
With mixer on low, slowly add the dry ingredients to the wet ingredients, mixing just until combined to avoid overmixing.
Pour in 1 cup milk and stir until just combined.
Pour the batter into the prepared 9×13 pan and smooth the top.
Bake for 32–35 minutes, or until a toothpick inserted in the center comes out clean.
Remove the cake from the oven and let it cool completely in the pan on a wire rack.
Make the frosting by beating 4 cups powdered sugar, 1 cup softened unsalted butter, and 2 teaspoons vanilla extract until light, fluffy, and smooth (about 5 minutes).
Spread the frosting evenly over the cooled cake.
Optionally, sprinkle rainbow sprinkles on top before slicing.

Pro Tips for Best Results

For moist and fluffy results, use the spoon-and-level method to measure your flour. Avoid scooping it directly with your measuring cup to prevent compacting the flour—extra flour leads to dry cake. Or, better yet, use a food scale for exact measurements.
This vanilla sheet cake keeps well in an airtight container on the counter for up to three days, then you can stash it in the fridge for up to four more days. Wrap it tightly and freeze if you want it to last a couple months.
Double-check your baking powder and baking soda to make sure they’re fresh—they’re the leavening agents that help your cake rise beautifully!
Always bring refrigerated ingredients like eggs, sour cream, and milk to room temperature before mixing. This helps the batter come together easily and avoids overmixing, which keeps the cake tender.

Flavor Swaps and Add-Ins

Want to mix things up? Here are some easy ways to put your own spin on this vanilla sheet cake:

Butter swap: Swap the ½ cup vegetable oil for ½ cup melted unsalted butter for a richer, more tender crumb. Just cool the butter before mixing in.
Lemon or orange twist: Add a tablespoon of fresh lemon or orange zest to the batter, plus ½ teaspoon citrus or vanilla extract for a bright, fresh flavor.
Poke cake: After baking, poke holes all over the cake and pour on sweetened condensed milk, lemon curd, or your favorite pudding filling for a fun pudding-style poke cake.
Berry fold-in: Gently fold in 1 to 1 ½ cups fresh or thawed frozen berries before baking. Toss frozen berries in a bit of flour first to keep colors from bleeding too much.
Chocolate version: Replace ½ cup of the flour with unsweetened cocoa powder and add an extra ¼ cup sugar. Finish with chocolate buttercream or a ganache topping.
Frosting swaps: Switch the vanilla buttercream for cream cheese frosting, chocolate ganache, or a light lemon glaze. If you use cream cheese frosting, chill the cake before serving for best results.
Extract swaps: Try almond extract (start with ¼ teaspoon) for a subtle nutty twist or coconut extract for a tropical vibe alongside the vanilla.
Gluten-free version: Use a 1:1 gluten-free flour blend, keeping an eye on texture as you bake and avoiding overmixing. Baking time might change a bit.

Storing and Make-Ahead Tips

Here’s how to keep your vanilla sheet cake fresh and ready, whether you’re making it ahead or saving leftovers:

Short-term: Once fully cooled and frosted, store the cake in an airtight container or covered cake carrier at room temperature for up to 3 days. Keep it away from heat and direct light.
Refrigerating: After 3 days out, or whenever it’s warm or you’ve used a perishable frosting like cream cheese, pop the cake in the fridge for up to 4 days. Take it out 30–60 minutes before serving to soften and bring back flavor.
Freezing: To freeze unfrosted cake, wrap it tightly in plastic wrap and then foil or a freezer bag, and freeze up to 2 months. For frosted cake, chill the frosting until firm first, then wrap gently and freeze. Thaw in the fridge overnight and bring to room temp before slicing.
Make-ahead: Bake days ahead and store unfrosted cake in the fridge or freezer as above. Frost fresh before serving for the best look. For easy transport to parties, use a sturdy cake carrier and keep chilled if it’s warm outside.
Reheating slices: Warm individual slices by microwaving for 8–12 seconds on medium power, checking often. Or heat in a 300°F oven for 5–10 minutes wrapped loosely in foil.
Frosting storage: Leftover buttercream keeps in the fridge up to 1 week in an airtight container. Bring to room temperature and whip briefly to refresh it before using again.

Common Baking Questions

What makes cakes moist and fluffy?

Two things really help create a moist and fluffy cake. First, whisk or sift dry ingredients before mixing which fluffs and aerates the mixture. Also, including sour cream adds acidity that works with baking soda to lift the cake while keeping it tender. Second, using oil like vegetable oil helps lock moisture in the crumb. These tips usually mean you’ll get a soft, fluffy cake every time you bake.

What’s the difference between a sheet cake and a cake?

Sheet cakes bake in large, shallow pans designed to serve a crowd. They’re wide and thin, unlike layered cakes which are taller and baked in smaller pans stacked on top of each other. A 9×13 pan cake like this vanilla sheet cake is often called a sheet cake because of its size and single-layer style, but it’s just as moist and fluffy as any layered cake.

Can dogs eat vanilla cake?

This vanilla sheet cake doesn’t include any ingredients toxic to dogs, so a small nibble won’t harm your pup. However, it does have sugar, which isn’t good for dogs regularly. So while a tiny taste is okay, it’s best to keep most cake for your family and offer pets dog-friendly treats instead.