Chocolate Sponge Cake (Light, Fluffy & No Baking Powder)

A real chocolate sponge cake rises on air alone. There is no baking powder in this recipe: the lift comes from whipping warm eggs and sugar until they triple in volume, then folding in cocoa and flour so gently that the bubbles survive the oven. The result is a light, tender, springy chocolate sponge that is lovely on its own and perfect for layering with cream and fruit. It is a technique cake, but once you know what to look for — the ribbon stage and a gentle fold — it is very reliable. For a richer, denser chocolate cake, see our triple chocolate cake.

Why you'll love this

• Light and airy. Whipped eggs give a tall, springy sponge.
• Seven simple ingredients. No baking powder or special flour.
• Lower in fat. Just a little oil keeps it tender.
• Perfect for layering. Split and fill with cream, jam or fruit.
• Learn a classic technique. The whipped-egg method is the base of many European cakes.
• Not too sweet. Ideal with tea or coffee.

Key ingredients & how to use them

• Eggs — four large, at room temperature. They are the only raising agent, so they must be whipped well. Warming them with the sugar over hot water helps them whip higher.
• Sugar — 150 g. It sweetens the cake and, crucially, stabilises the whipped eggs so the foam holds its air.
• Cocoa powder — 50 g for deep chocolate flavour. Sift it to remove lumps, which are hard to fold out without deflating the batter.
• All-purpose flour — 100 g gives structure. Sift it with the cocoa.
• Milk and vegetable oil — 50 ml each. They keep the sponge moist and tender, since cocoa can make cakes dry.
• Salt — a pinch to sharpen the chocolate flavour.

How to make it (step by step)

1. 1

   Heat the oven and line the pan

   Heat the oven to 180°C (350°F). Grease a 9-inch round cake pan and line the base with parchment. Do not grease and flour the sides heavily; a sponge climbs the sides as it rises.

2. 2

   Warm the eggs and sugar

   Set a heatproof bowl over a pan of barely simmering water, making sure the bowl does not touch the water. Add the eggs and sugar and whisk constantly until the mixture is lukewarm and the sugar has dissolved, about 3 to 4 minutes. Warm eggs whip up much higher and more stably.

3. 3

   Whip to the ribbon stage

   Take the bowl off the heat and beat with an electric mixer on high for 6 to 8 minutes, until the mixture is pale, thick and tripled in volume. When you lift the beaters, it should fall back in a thick ribbon that sits on the surface for a few seconds before disappearing.

4. 4

   Mix the wet ingredients

   In a small bowl, whisk the milk, oil and salt together.

5. 5

   Fold in the flour and cocoa

   Sift the cocoa powder and flour over the whipped eggs in two or three additions, folding gently with a large spatula after each. Cut down through the middle, sweep along the bottom and turn the bowl. Fold just until no dry streaks remain — every stir knocks out air.

6. 6

   Fold in the milk mixture

   Stir a large spoonful of the batter into the milk mixture to lighten it, then pour it back into the bowl around the edge and fold gently until combined. This stops the heavier liquid sinking to the bottom.

7. 7

   Bake

   Pour the batter into the pan, tap it once on the counter to release large bubbles and bake for 25 to 30 minutes, until the top springs back when pressed and a skewer comes out clean. Do not open the oven in the first 20 minutes.

8. 8

   Cool and serve

   Cool the cake in the pan for 10 minutes, then run a knife around the edge, turn it out onto a rack and cool completely. Serve plain, dusted with cocoa, or split and fill with whipped cream.

Troubleshooting

• The cake is flat and dense. The eggs were not whipped enough or the batter was overmixed when folding. Whip to the ribbon stage and fold gently.
• There are pockets of flour. The flour and cocoa were not sifted, or were added all at once. Sift and add in stages.
• It sank after baking. The oven door was opened early or the cake was underbaked. Wait until the top springs back.
• A dense layer at the bottom. The milk and oil sank. Lighten them with some batter first, then fold in around the edge.
• The sponge is dry. It was overbaked. Start checking at 25 minutes.
• It stuck to the pan. Line the base with parchment and loosen the edge with a knife.

Sponge cake vs regular chocolate cake

Most everyday chocolate cakes are butter or oil cakes: they rise mainly thanks to baking powder or baking soda and have a rich, moist, slightly dense crumb. A sponge cake is different. It is built on a foam of whipped eggs and sugar, so its rise comes from millions of tiny air bubbles that expand in the oven. That gives a lighter, springier, drier crumb that loves to soak up syrups, creams and fruit juices — which is why sponges are the base of Black Forest gateau, trifles and Swiss rolls.

The trade-off is that a sponge is more sensitive to technique. The two moments that matter are whipping the eggs long enough to reach the ribbon stage and folding the dry ingredients in gently enough to keep the air. Get those right and this chocolate sponge cake rises tall every time.

Serving ideas

Serve the sponge plain with tea, dusted with cocoa or icing sugar, or split it and fill with whipped cream and berries. It also makes a good base for trifles. For more chocolate bakes, try our hot fudge chocolate pudding cake.