Hairy Bikers Chocolate Cake Recipe

This fudgey, moist Hairy Bikers Chocolate Cake Recipe is made with golden syrup, rich cocoa powder, and fresh eggs, and is ready in just over an hour. The best part is smoothing the glossy chocolate buttercream over the cooled sponges before slicing into the dark, soft crumb. I love how the addition of syrup keeps this bake incredibly tender for days without it ever becoming dry.

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Why This Classic Works

I used to think all chocolate sponges were destined to be a bit dry by the second day, but this version changes everything. The secret weapon here is golden syrup; it acts as a humectant, locking moisture into the crumb so you get that lovely “squidgy” texture that Si and Dave are famous for, without the cake becoming heavy or dense like a brownie.

Another lesson I learned with this recipe is the importance of using cocoa powder for the sponge rather than melted chocolate. Melted chocolate can weigh down the batter, preventing a good rise, whereas cocoa powder delivers a deep, savoury chocolate hit while allowing the self-raising flour to do its job perfectly.

Hairy Bikers Chocolate Cake Recipe Ingredients

For the Sponge:

• 200g butter, softened (plus extra for greasing)
• 200g caster sugar
• 4 large eggs, at room temperature
• 2 tbsp golden syrup
• 200g self-raising flour
• 2 tbsp cocoa powder
• 1 tsp baking powder
• 1 tsp vanilla extract
• 2 tbsp milk (to loosen the batter)

For the Chocolate Icing:

• 100g dark chocolate (at least 70% cocoa solids)
• 100g butter, softened
• 200g icing sugar, sifted
• 1 tsp vanilla extract
• 1 tbsp milk (optional, if needed)

How To Make Hairy Bikers Chocolate Cake Recipe

1. Preheat and Prep: Preheat your oven to 180°C (160°C fan/Gas 4). Grease two 20cm (8-inch) sandwich tins with a little butter and line the bases with baking parchment to ensure the cakes release perfectly.
2. Cream Butter and Sugar: In a large mixing bowl, beat the softened butter and caster sugar together using an electric whisk or wooden spoon until the mixture is very pale, fluffy, and aerated (about 3-5 minutes).
3. Add Eggs and Syrup: Whisk in the eggs one at a time, adding a tablespoon of the flour with each egg to stop the mixture from curdling. Beat in the golden syrup and vanilla extract until combined.
4. Fold Dry Ingredients: Sift the remaining self-raising flour, cocoa powder, and baking powder into the bowl. Fold these in gently using a large metal spoon or spatula, keeping as much air in the batter as possible. Stir in the milk if the batter feels too stiff—it should drop easily from the spoon.
5. Bake the Sponges: Divide the mixture evenly between the two prepared tins and smooth the tops. Bake for 25 minutes, or until the cakes are well-risen and springy to the touch. A skewer inserted into the centre should come out clean.
6. Cool Completely: Remove the tins from the oven and leave them to stand for 5 minutes. Turn the cakes out onto a wire rack, peel off the parchment, and leave them to cool completely before icing.
7. Make the Icing: Melt the dark chocolate in a heatproof bowl set over a pan of simmering water (don’t let the bowl touch the water) and set aside to cool slightly. Beat the butter and sifted icing sugar together until smooth, then fold in the cooled melted chocolate and vanilla extract.
8. Assemble the Cake: Place one sponge on a serving plate and spread with half the icing. Top with the second sponge and use the remaining icing to cover the top, creating swirls with a palette knife.

Recipe Tips

• Room Temperature Matters: Ensure your butter is properly softened and eggs are at room temperature. If they are cold, the batter will split and the resulting cake will be heavy rather than light and fluffy.
• Don’t Skip Sifting: Cocoa powder is notorious for forming small, bitter lumps in the packet. Always sift it with the flour to ensure an even chocolate flavour throughout the sponge.
• Check Dates: Since this recipe relies on self-raising flour and baking powder for lift, make sure your raising agents are in date. Old baking powder is a common reason for flat, dense cakes.
• Cooling the Chocolate: When making the icing, let the melted chocolate cool until it is tepid before adding it to the butter mixture. If it’s too hot, it will melt the butter and your icing will become a runny mess.

What To Serve With Chocolate Cake

This rich cake pairs beautifully with fresh berries, such as raspberries or strawberries, which provide a tart contrast to the sweet fudge icing. For a truly indulgent dessert, serve a slice with a dollop of crème fraîche or a pour of single cream to cut through the richness.

How To Store

Store the cake in an airtight container at room temperature for up to 3 days; the golden syrup helps it retain moisture well. If you want to keep it longer, you can freeze the un-iced sponge layers for up to 3 months—just wrap them tightly in cling film and foil.

FAQs

• Can I use milk chocolate for the icing? Yes, you can, but the result will be much sweeter. Using dark chocolate provides a better balance against the sweet sponge and gives the cake a more sophisticated flavour profile.
• Why did my cake sink in the middle? This usually happens if the oven door was opened before the cake was set, causing the air bubbles to collapse. It can also be caused by over-beating the batter once the flour has been added.
• Can I make this as a traybake? Absolutely. You can bake this amount of batter in a roughly 20x30cm rectangular tin. You will likely need to adjust the baking time to around 30-35 minutes; check it with a skewer.

Nutrition

• Calories: 580 kcal
• Total Fat: 32g
• Saturated Fat: 19g
• Cholesterol: 145mg
• Sodium: 310mg
• Total Carbohydrate: 68g
• Protein: 6g

Try More Recipes:

• Hairy Bikers Chicken Dhansak Recipe
• Hairy Bikers Beetroot Soup Recipe
• Hairy Bikers Bakewell Tart Recipe