Sponge Cake (Mom's)
Light, fluffy, and just sturdy enough to stack — Mom's classic vanilla sponge, with the tweaks that finally got it to hold a tier.
This is the cake I grew up eating. Mom used to bake it on weekends, and the whole house would smell like vanilla and warm eggs. It is still the cake I default to when I want something simple and nostalgic, the one I make without thinking when there is nothing else to celebrate and also when there is everything to celebrate.
The thing I have been chasing, the line I am still walking, is getting the egg whites just right so the crumb is fluffy but the cake can actually hold its shape. Even stacked into tiers. Mom's came out perfect every single time and she measured nothing. I measure carefully and hope for the same, and on a good day the kitchen smells the way it used to.
I have finally figured out the part nobody writes down: stop whipping the whites at stiff peaks (peaks stand straight but tip slightly), fold in three additions with a big scoop from the bottom, and brush each layer with simple syrup so the cake stays moist overnight. That last one is what makes it possible to assemble a tiered cake the night before. It is a small thing, and it changed everything.
This is Mom's cake, with my notes in the margins. Use a nine-inch pan if you want a tall single layer, or two eight-inch pans if you are stacking. Either way, eat a slice warm from the pan, while the crumb is still a little steamy. That is the version I cannot get enough of.
Ingredients
- 5 large eggs, separated, room temperature
- 100g cake flour
- 100g caster sugar, divided (60g for yolks, 40g for whites)
- 50ml whole milk
- 50ml vegetable oil
- 1 teaspoon pure vanilla extract
- 1/4 teaspoon cream of tartar
- Pinch of fine salt
Method
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Preheat the oven to 170C (340F). Line a 9-inch round pan with parchment paper, leaving a little overhang on the sides so you can lift the cake out cleanly.
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In a large bowl, whisk the egg yolks with 60g of the sugar until the mixture is pale, thick, and falls in ribbons when you lift the whisk. Add the milk, oil, and vanilla and whisk to combine.
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Sift the cake flour over the yolk batter and fold it in gently with a spatula. Do not deflate the batter — big scoops from the bottom, a slow turn of the wrist.
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In a clean, dry bowl (wipe with a little vinegar on a paper towel if you are worried), beat the egg whites with the cream of tartar and salt on medium speed until foamy. With the mixer running, gradually sprinkle in the remaining 40g of sugar and keep beating until you reach stiff peaks — the tips stand straight up but curl over just slightly at the very top.
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Fold the whites into the yolk batter in three additions. Each time, scoop from the bottom and cut through the middle, turning the bowl as you go. Stop the moment there are no white streaks. Overfolding is what makes a sponge tough.
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Pour the batter into the prepared pan, tap the pan on the counter a few times to release any big air bubbles, and smooth the top.
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Bake for 35 minutes, or until the top is golden and springs back when you touch it lightly. A skewer should come out with just a few moist crumbs, not wet batter.
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Invert the pan onto a wire rack (rest the rim on a cup if you need to) and let the cake cool completely before slicing. Cooling upside down keeps the top from sinking.
Tips & Swaps
- Room temperature eggs whip far better — take them out 30 minutes before you start.
- Stop the whites at stiff peaks, not beyond. Over-whipped whites make the cake dry and crumbly.
- The fold is everything — too aggressive and you will lose the air you spent ten minutes building.
- For tiered cakes: brush each cooled layer with simple syrup (1:1 sugar and water, boiled until the sugar dissolves, cooled) so the cake stays moist overnight.
- For a stronger structure (wedding-tier style): bake in a hot-water bath, or swap 1 tablespoon of the cake flour for 1 tablespoon of cornstarch.
- Variations: pandan (replace vanilla with 1 teaspoon pandan extract and a drop of green food color), chocolate (swap 20g of the flour for cocoa powder), lemon (add the zest of 1 lemon with the vanilla).
