8-Inch Sponge Cake Recipe: Fluffy Layers Baked in One Tin

This 8-inch sponge cake recipe delivers perfectly fluffy layers baked in a single tin—no complicated assembly required. The secret lies in precise mixing techniques and oven control, which transform simple ingredients into a tender, airy cake with just the right balance of structure and lightness. I've perfected this method after years of testing, ensuring consistent results every time without the need for multiple layers or tricky techniques.

The magic happens with a foolproof method that combines cake flour, eggs, and sugar to create a stable yet tender crumb. You'll work with room-temperature ingredients and a specific mixing approach that incorporates air without overdeveloping the gluten. The cake bakes in one 8-inch round tin, making it ideal for special occasions or elegant desserts where presentation matters as much as taste.

What you'll end up with is a golden, domed cake with a fine, even crumb that's light yet sturdy enough to support fillings or frosting. The texture is consistently fluffy throughout, not dense at the bottom or dry at the top—a common issue in many sponge cake recipes. This version stays moist for days, making it perfect for making ahead or serving at gatherings where you want dessert to shine.

While this recipe works beautifully plain, it's equally versatile for variations like vanilla sponge, chocolate-infused, or citrus-flavored cakes. Pair it with your favorite filling—whipped cream, jam, or ganache—or keep it simple with dusted powdered sugar. The possibilities are endless, but the foundation remains the same: a reliable, professional-quality sponge that's surprisingly simple to achieve.

Ingredients for 8 inch sponge cake

Precision-mixed ingredients for a professional-quality sponge in one 8-inch tin.

The cake flour is non-negotiable here—it delivers that signature tender crumb. Bob's Red Mill or King Arthur brands are reliable choices, but avoid self-rising varieties. European-style unsalted butter with at least 82% fat content (like Plugrá) creates a richer texture. For the sugar, superfine dissolves more easily, but if you only have granulated, pulse it in a food processor for 30 seconds. Eggs should be separated—room temperature is critical for proper emulsification. The lemon zest adds brightness without overpowering, so use organic when possible to avoid wax coatings.

No cake flour? Substitute 1.25 cups all-purpose flour plus 0.25 cup cornstarch—sift thoroughly to mimic the fine texture. European butter unavailable? Land O'Lakes or Challenge work in a pinch, though texture may be slightly less tender. For vanilla, imitation extracts contain solvents that can alter flavor—stick with pure Madagascar or Tahitian. The milk can be swapped for evaporated milk or heavy cream for extra richness, but whole milk maintains the classic sponge texture. If you're making ahead, separate the eggs and store yolks and whites separately in the fridge for up to 2 days—whites lose volume when refrigerated overnight.

This cake stays fresh for 5 days when wrapped tightly in plastic at room temperature, or 1 week refrigerated. For longer storage, slice and freeze portions between parchment—thaw at room temperature before serving. The domed shape is intentional; don't flatten it. For serving, dust with powdered sugar immediately before slicing to preserve that just-baked look. The optional butter glaze (melted butter + powdered sugar) adds a professional finish and keeps the cake moist for 3 days longer. Always bake in a light-colored 8-inch round tin—dark pans can over-brown the delicate top.

Step-by-step instructions for fluffy 8-Inch sponge cake

Master this technique once and you'll achieve professional-quality layers every time.

Begin by separating the 6 whole large eggs, placing yolks in one bowl and whites in another. Let both come to room temperature while you prepare the rest. Preheat your oven to 350°F and position a rack in the center position. Grease an 8-inch round cake pan generously with ½ tablespoon of the unsalted butter, then line the bottom with parchment paper for easy removal.

In a separate bowl, sift together the 1.5 cups cake flour, 0.25 cup all-purpose flour, 1.5 teaspoons baking powder, and 0.5 teaspoon salt. This dry mixture should be completely smooth with no lumps. Whisk in the 1 tablespoon vanilla extract and 1 tablespoon lemon zest, then set aside. The citrus notes will brighten the final cake beautifully.

Using a clean, grease-free bowl and electric mixer, whip the egg whites on medium speed until soft peaks form. Gradually increase to high speed and continue whipping until the meringue forms glossy, stiff peaks that hold their shape when the whisk is lifted. This typically takes 3-5 minutes—don't rush this step as properly whipped egg whites are the secret to that signature light texture.

In a separate large bowl, combine the 1.5 cups granulated sugar with the egg yolks. Whisk vigorously for 2-3 minutes until the mixture becomes pale and triples in volume. This process incorporates air and creates a stable base for your cake. The mixture should be thick enough to hold soft peaks when dropped from a spoon.

Gently fold one-third of the dry flour mixture into the yolk-sugar combination using a spatula, being careful not to deflate the air you've incorporated. Add another third and fold just until combined, then incorporate the remaining flour. This gradual approach prevents dense pockets in your final cake.

In three separate additions, fold in the whipped egg whites using a gentle scooping motion. Start at the bottom of the bowl and work your way to the top to maintain maximum air incorporation. The batter should be thick but pourable—if it's too stiff, you may have overmixed the egg whites. Add the 0.25 cup milk and mix gently just until combined.

Pour the batter into your prepared 8-inch cake pan and smooth the top with a spatula. Tap the pan gently on the counter 3-4 times to remove any air bubbles. Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean. The cake should spring back when pressed gently in the center.

Immediately after removing from the oven, invert the cake onto a wire rack and let it cool completely before removing the parchment. This prevents cracking and maintains that perfect dome shape. For best results, allow the cake to cool completely before frosting. The 1 cup powdered sugar and 0.25 cup melted unsalted butter (if using) can be used for a simple buttercream once fully cooled.

Essential equipment for this dish

Essential Mixing Tools

Your stand mixer with the K-beater attachment is non-negotiable for this recipe—I use my KitchenAid Artisan Series for its consistent power. The wire whisk for egg whites must be grease-free to achieve stiff peaks efficiently. For folding, a heat-resistant silicone spatula (like OXO Good Grips) prevents batter from sticking to metal tools. 💫

A digital kitchen scale ensures precise measurements, especially for the 1.5 cups cake flour—weight-based measuring prevents packing issues. I also recommend a fine-mesh sieve for sifting dry ingredients thoroughly, which eliminates lumps that can create dense spots in your cake.

Baking Essentials

An 8-inch round cake pan with 2-inch sides is ideal—Wilton Perfect Results pans work perfectly. Light-colored pans prevent over-browning, while dark pans can scorch the delicate top. Always use parchment paper on the bottom for easy removal and a clean finish. 🔥

For temperature control, a thermometer (like Thermoworks Thermapen) ensures your oven stays at 350°F—fluctuations can cause uneven baking. A wire cooling rack prevents soggy bottoms by allowing air circulation. I keep one near my oven for immediate use after baking.

Optional Upgrades

A food processor comes in handy for pulsing granulated sugar into a superfine texture if you don’t have it. For professional results, consider a cake dome (available on Amazon) to maintain the perfect shape while cooling. This is especially useful if you’re making ahead or shipping cakes. ✨

For flavor variations, a microplane for fresh lemon zest and a high-quality vanilla extract (like Madagascar Bourbon) elevate the cake’s brightness. If you’re adding fillings, a piping bag with a star tip helps create elegant swirls of jam or cream.

Frequently asked questions