Mary Berry Opera Cake Recipe

This layered rich Mary Berry Opera Cake is made with almond sponge and coffee buttercream and ready in 3 hours 45 minutes. Pouring the glossy chocolate glaze over the chilled top creates a flawlessly smooth finish that catches the light. I always feel a massive sense of achievement when revealing those distinct, neat layers.

What I Learned Making This

My first attempt at this intricate bake taught me that patience is just as important as the ingredients. Rushing the assembly process meant my warm ganache melted the delicate buttercream, ruining the neat definition.

I soon realised that chilling the cake thoroughly between each stage is absolutely essential. Taking the time to let everything set gives you those razor-sharp layers Mary Berry expects.

Mary Berry Opera Cake Ingredients

For the Joconde Sponge:

• 3 large egg whites
• 15g caster sugar
• 100g ground almonds
• 100g icing sugar
• 3 large eggs
• 30g plain flour
• 30g unsalted butter, melted

For the Coffee Syrup:

• 100ml water
• 50g caster sugar
• 2 tbsp instant coffee granules

For the French Buttercream:

• 100g caster sugar
• 3 tbsp water
• 3 large egg yolks
• 150g unsalted butter, softened
• 1 tbsp coffee extract

For the Ganache and Glaze:

• 250g dark chocolate, chopped
• 150ml double cream
• 30g unsalted butter

How To Make Mary Berry Opera Cake

1. Make the sponge: Whisk egg whites and caster sugar to stiff peaks. In another bowl, beat almonds, icing sugar, and whole eggs until light, then fold in flour, melted butter, and the whipped whites.
2. Bake the layers: Divide the batter into three prepared 20cm square tins and bake at 200°C (180°C fan) for 10-12 minutes until springy to the touch.
3. Prepare the syrup: Gently heat the water, sugar, and coffee granules in a small pan until the sugar dissolves completely, then leave it to cool.
4. Mix the buttercream: Boil the sugar and water to 115°C, slowly pour it over the whisking egg yolks, then beat in the soft butter and coffee extract until thick.
5. Create the ganache: Heat the double cream until steaming, pour it over 150g of the chopped dark chocolate, and stir gently until smooth and glossy.
6. Assemble the cake: Brush a sponge layer with coffee syrup, spread half the buttercream, add another sponge, syrup, the ganache, the final sponge, syrup, and remaining buttercream. Chill for 1 hour.
7. Apply the glaze: Melt the remaining 100g of chocolate with the butter, pour it over the chilled cake, smooth the top, and chill until set before trimming the edges.

Recipe Tips

• Weigh precisely: Baking this requires strict measurements because the delicate sponge relies on exact ratios to rise properly.
• Cool completely: Applying buttercream or ganache to warm sponges will cause the layers to melt and slide off each other.
• Use a hot knife: Trimming the edges with a knife dipped in hot water gives you those professional, clean sides.
• Check syrup heat: Ensure the sugar syrup for the French buttercream hits 115°C exactly so the yolks cook safely and volumise properly.

What To Serve With Opera Cake

This rich dessert pairs beautifully with a simple cup of dark roast espresso to cut through the sweetness. A small dollop of unsweetened creme fraiche on the side also helps balance the intense chocolate and coffee flavours.

How To Store

Keep the cake in an airtight container in the fridge for up to 3 days. Let it sit at room temperature for 20 minutes before serving to soften the buttercream. You can freeze the fully assembled, uncut cake wrapped tightly for up to 2 months.

FAQs

Can I use standard buttercream?
French buttercream uses egg yolks and hot sugar syrup, giving a richer texture that standard icing sugar buttercream cannot match.

Why did my sponge crack?
Overbaking the thin Joconde sponge makes it dry and brittle, so watch it closely after 10 minutes in the oven.

Do I need a sugar thermometer?
Yes, achieving the correct 115°C soft-ball stage for the French buttercream is very difficult by eye alone.

Can I make it over two days?
Absolutely, baking the sponges and making the syrup on day one makes the assembly much easier on day two.

Nutrition

• Calories: 520 kcal
• Total Fat: 36g
• Saturated Fat: 18g
• Cholesterol: 145mg
• Sodium: 85mg
• Total Carbohydrate: 42g
• Protein: 8g

Try More Recipes:

• Mary Berry Pineapple Cake Recipe
• Mary Berry Plum Cake Recipe
• Mary Berry Plum and Almond Cake Recipe