Coffee & Walnut Cake (Classic British Sponge with Coffee Buttercream)

The Coffee & Walnut Cake is a timeless British classic that perfectly balances deep coffee flavour with the natural crunch and sweetness of walnuts. Traditionally enjoyed with afternoon tea, this elegant sponge cake has remained a staple in UK baking for generations—and for good reason. Its light yet moist texture, paired with silky coffee buttercream, makes it ideal for both casual home baking and special occasions.

This recipe features two soft coffee-infused sponge layers made using the traditional creaming method, ensuring a fluffy crumb and even rise. Instant coffee or espresso powder dissolves smoothly into the batter, delivering rich flavour without bitterness. Chopped walnuts are folded into the sponge for texture, while extra walnuts are often used to decorate the top, giving the cake its iconic look.

What truly elevates this cake is the coffee buttercream frosting. Made with butter, icing sugar, and concentrated coffee, the buttercream is smooth, creamy, and indulgent without being overpowering. When sandwiched between the sponge layers and spread lightly on top, it creates a beautifully balanced dessert that appeals to both coffee lovers and cake enthusiasts alike.

From an SEO perspective, this Coffee & Walnut Cake recipe is ideal for audiences searching for easy British cake recipes, classic coffee cake, walnut sponge cake, or afternoon tea desserts. It’s versatile enough to be served as a birthday cake, teatime treat, or even a simple dessert with cream or ice cream.

Whether you’re an experienced baker or trying your hand at a traditional British bake for the first time, this recipe offers reliable results and timeless flavour. The ingredients are simple, the method is straightforward, and the outcome is a bakery-quality cake you’ll be proud to serve. Brew a cup of tea or coffee, slice generously, and enjoy a true classic that never goes out of style.

Ingredients

• For the Cake:
• 200g unsalted butter, softened
• 200g caster sugar
• 4 large eggs
• 200g self-raising flour
• 2 tbsp instant coffee or espresso powder
• 2 tbsp boiling water
• 100g walnuts, roughly chopped
• 1 tsp vanilla extract
• For the Coffee Buttercream:
• 150g unsalted butter, softened
• 300g icing sugar
• 1½ tbsp instant coffee
• 1 tbsp boiling water
• To Decorate (Optional):
• Whole or chopped walnuts
• Light dusting of cocoa powder

Directions

1. Preheat your oven to 180°C (160°C fan) or 350°F. Grease and line two 20cm round cake tins.
2. Dissolve the coffee in boiling water and set aside to cool slightly.
3. In a large bowl, cream the butter and sugar together until pale and fluffy.
4. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
5. Fold in the self-raising flour gently, followed by the dissolved coffee.
6. Add the chopped walnuts and mix until evenly distributed.
7. Divide the batter evenly between the prepared tins and smooth the tops.
8. Bake for 30–35 minutes, or until a skewer inserted into the centre comes out clean.
9. Allow the cakes to cool in the tins for 10 minutes, then transfer to a wire rack to cool completely.
10. To Make the Buttercream:
11. 10. Dissolve the coffee in boiling water and allow to cool.
12. 11. Beat the butter until creamy, then gradually add the icing sugar.
13. 12. Mix in the cooled coffee until smooth and fluffy.
14. Assembly:
15. 13. Spread buttercream over one sponge layer, place the second on top, and frost the top evenly.
16. 14. Decorate with walnuts if desired. Slice and serve.