Chiffon Cake

Ingredients

• 3–5 whole (depending on tin size) Eggs
• 50–80 g Caster sugar
• 25–40 g Vegetable oil
• 30–50 g Milk or water
• 50–90 g Cake flour (low-protein)
• optional Lemon juice or white vinegar

Method

Chiffon cake hinges on a single principle: two separate emulsions that trap air at different scales, then marry them without collapsing the structure. Start with oil and milk. Whisk them hard until pale and thickened—this is emulsification, where vigorous agitation suspends the fat in the water. Sift cake flour (low-protein, ideally 8–9% to avoid toughness) into this base and fold with a spatula until no streaks remain. Fold in the yolks last; the mixture should be glossy and pourable. Set aside.

For the whites: acid matters. A pinch of lemon juice or vinegar denatures the proteins and stabilises the foam, making it harder to overwhisk and easier to hold volume. Start at medium speed until coarse foam forms, then add one-third of the sugar. Move to high speed. The sugar dissolves into the whites, stiffening the foam and raising its melting point. Add the second third when finer bubbles appear; add the final third when you reach wet peaks—tips drooping slightly when the whisk is lifted. Continue whisking at medium-low until stiff peaks form, firm and unyielding when the bowl inverts. This is whisking to aeration endpoint: the whites should be glossy and hold their shape without weeping.

Fold whites and yolk batter in two stages. Stir the yolk base a few turns to loosen it, then fold in one-third of the whites with a gentle turning motion—spatula down the centre, sweep under and up, rotate bowl a quarter-turn. This reduces density mismatch. Pour the lightened yolk mixture back into the remaining whites and fold until colour is even and no white streaks persist. Work quickly but without rushing; aggressive folding shears the bubbles.

Pour into an ungreased tin—the bare surface grips the cake and aids rise. Tap once on the counter to dislodge large air pockets. Bake at 150 °C on the upper rack, 160 °C on the lower, for the first three-fifths of time, then raise both by 10 °C for the final stretch. For a 15 cm tin, expect 32–35 minutes; for a 20 cm tin, 50 minutes. The cake should dome slightly and spring back when touched near the centre. Invert immediately onto a bottle neck or cake cooler—the cake must cool upside-down to stop it collapsing back on itself. Once cold, run a thin knife around the edges and turn out onto a plate. Slice with a serrated knife using a sawing motion, not downward pressure.