All-In-One Sponge Cake Recipe: Light-as-Air Layers Without Separate Steps

This all-in-one sponge cake recipe eliminates the guesswork of traditional methods, delivering perfectly light layers with just one bowl. The secret lies in a precise ratio of ingredients and a gentle folding technique that creates airy, even texture without separating. I've baked countless versions, and this method consistently produces a cake that's tender yet sturdy enough to hold frosting or fillings.

What sets this recipe apart is its simplicity—no separate steps for egg whites or folding in butter. The cake batter comes together in minutes, then bakes to golden perfection with minimal effort. The result is a delicate crumb that's moist but not dense, with just enough structure to slice cleanly. This is the kind of cake that makes even experienced bakers pause and take notes.

By the time you're done, you'll have a cake that's light enough to float, yet sturdy enough to hold your favorite fillings or frosting. The flavor is neutral enough to adapt to any flavor profile, making it incredibly versatile. Whether you're serving it plain with fresh berries or layered with cream cheese frosting, this sponge cake delivers restaurant-quality results at home.

The beauty of this method is its adaptability—you can easily infuse flavors like vanilla, lemon, or chocolate by adding extracts or melted chocolate to the batter. The same technique works for both single-layer cakes and multi-tiered creations. Let's get started on creating your perfect sponge cake.

Ingredients for all in one sponge cake

Twelve simple ingredients transform into a cloud-light sponge cake with no fuss.

The flour is non-negotiable here—King Arthur or Gold Medal are my go-tos for that perfect crumb. Butter needs to be room temperature, not melted or cold. I grab mine from Trader Joe's in the bulk section, but any unsalted brand works. Eggs should be large and room temperature—cold eggs make the cake dense. The vanilla extract? Pure Madagascar bourbon is the gold standard, but imitation works in a pinch. Pro tip: measure your flour by spooning it into the cup and leveling off—don't scoop directly from the bag.

No vanilla extract? Almond extract at half the amount works, but it tastes different. Short on cornstarch? Arrowroot powder is a 1:1 swap. The milk can be any kind—whole, 2%, even almond milk if you're avoiding dairy. For the lemon zest, organic lemons from the grocery store work fine, but skip the waxed ones. The baking powder? Check the expiration date—old baking powder loses its lift. And if you're feeling fancy, add a pinch of cardamom for a subtle twist.

This batter keeps in the fridge for 2 days if you want to prep ahead, but bake it fresh for the best texture. The cake stays moist for 3-4 days wrapped tightly, but honestly? It's best the day it's made. For storage, I like to slice it and freeze portions between parchment paper—perfect for quick desserts. And if you're making layers? Bake two pans at once—they're ready in about 25-30 minutes at 350°F.

Step-by-step instructions for all-in-one sponge cake

This method delivers light, airy layers with just one bowl—no folding or separating required.

In a large mixing bowl, combine the 4 whole Large Eggs and 1.5 cups Granulated Sugar. Using an electric mixer on medium speed, beat for 3-4 minutes until the mixture turns pale and nearly doubles in volume. You'll notice thick, glossy ribbons forming when you lift the beaters—they should hold their shape for a moment before melting back into the batter.

This step is where all the magic happens. The sugar dissolves completely and air gets incorporated into the eggs, creating the light, fluffy texture we want. If you're using room temperature eggs, they'll blend more smoothly—no need to warm them further. Here's the thing—don't rush this part. The mixture should be thick enough to leave a trail when you lift the beaters, but still pourable.

Reduce mixer speed to low and gradually add the 1 cup Unsalted Butter, 0.25 cup Vegetable Oil, 1 tbsp Cornstarch, 1.5 tsp Baking Powder, and 0.5 tsp Salt. Mix just until these ingredients are fully incorporated—about 30 seconds—being careful not to deflate the egg mixture. You want to maintain that airy texture we worked so hard to create.

I like to add the butter first since it's solid at room temperature, then the oil which helps keep the cake moist. The cornstarch and baking powder work together to create that tender crumb. At this point, your mixture should look like a thick, pale yellow custard. Don't worry if it seems a bit curdled—that's normal and will smooth out in the next step.

Add the 0.5 cup Whole Milk, 1 tbsp Vanilla Extract, and 1 tsp Lemon Zest to the bowl. Mix on low speed for another 30 seconds until everything is completely combined. The milk helps hydrate the dry ingredients while adding richness, and the lemon zest gives a bright, subtle citrus note that pairs perfectly with vanilla.

This is where the cake gets its signature flavor profile. I always use fresh lemon zest because it's more aromatic than bottled versions. Give the batter one final stir with a spatula to make sure everything is evenly distributed. At this point, your batter should be smooth, thick, and have a beautiful pale yellow color with just a hint of lemon flecks.

Using a spatula, gently fold in the 2 cups All-Purpose Flour that has been sifted with 0.25 tsp Cream of Tartar. Be careful here—you want to maintain as much air as possible. Lift the batter from the bottom of the bowl and fold it over the top, rotating the bowl occasionally. Do this 4-5 times until the flour is just barely incorporated and no dry spots remain.

Here's the crucial part: don't overmix. You're looking for a batter that's just combined—it should still be thick and slightly shiny. If you overmix, you'll develop gluten and end up with a tough cake instead of that light, tender texture we're after. The cream of tartar in the flour helps stabilize the egg whites we incorporated earlier, giving us that perfect rise.

Preheat your oven to 350°F. Grease and flour three 8-inch round cake pans (or one 9x13-inch pan if making a sheet cake). Divide the batter evenly among the pans—you should have about 2/3 cup in each round pan or spread the batter evenly in the sheet pan. Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.

I always bake mine in round pans for that classic layer cake look, but a sheet pan works great if you're making a single-layer cake. The cake is done when it's golden on top and springs back slightly when you press the center gently. Don't open the oven door during baking—this can cause the cakes to sink. Let them cool in the pans for 10 minutes before transferring to a wire rack to cool completely.

Creative variations of this all in one sponge cake

Citrus Variations

Brighten up your sponge cake with zesty citrus flavors. Swap the vanilla extract for 2 tbsp orange extract or 1 tbsp lime extract, and increase the lemon zest to 2 tsp. For an extra pop, add 2 tbsp fresh orange juice when incorporating the milk. I love this version with a light cream cheese frosting—it's like a tangy cloud cake! 🍊

Chocolate Twist

Transform this into a decadent chocolate sponge by adding ½ cup Dutch-process cocoa powder to the dry ingredients and reducing the flour to 1¾ cups. For extra richness, melt ½ cup dark chocolate (60% cocoa) and stir it into the milk mixture. Top with whipped cream and chocolate shavings for a showstopper dessert. 🍫