Name: Coffee and Walnut Cake Recipe
Prep time: 15 min
Cook time: 30 min
Total time: 55 min
Cuisine: British
Ingredients: 15 g instant coffee (granules or powder); 250 g unsalted butter (softened); 250 g golden caster sugar (or white caster or granulated sugar); 4 large eggs (beaten); 250 g self-raising flour; 1 tsp baking powder; 100 g walnuts (chopped, with some halves reserved for decoration); 250 g unsalted butter (softened); 320 g icing sugar; 15 g instant coffee (granules or powder); 85 ml double cream (heavy cream) (optional)

If you’re on the lookout for a delightful treat that perfectly balances rich coffee flavors with the satisfying crunch of walnuts, this Coffee and Walnut Cake Recipe is exactly what you need. It’s a classic British favorite known for its moist, tender sponge infused with coffee and studded with crunchy walnuts, all finished off with a luxuriously smooth coffee-infused buttercream. Whether you’re serving it for a special occasion or simply craving a comforting slice with your afternoon tea, this cake has a way of making every moment a little sweeter and more memorable.

Ingredients You’ll Need

This Coffee and Walnut Cake Recipe relies on a handful of simple ingredients, each playing a starring role in achieving the perfect combination of texture, flavor, and visual appeal. From the aromatic instant coffee that brings warmth, to the crunchy walnuts adding texture, each element is essential for that classic taste.

Instant coffee (15 g): Use granules or powder to infuse the sponge and buttercream with that unmistakable coffee aroma and flavor.
Unsalted butter (500 g total, softened): Divided between sponge and buttercream, butter adds moistness and richness that keeps the cake tender and luscious.
Golden caster sugar (250 g): Offers just the right sweetness, with a hint of caramel notes that beautifully complement the coffee.
Large eggs (4 beaten): These bind the ingredients together and contribute to the light, airy texture of the sponge.
Self-raising flour (250 g): This helps the cake rise nicely, giving you that delicate crumb perfect for layering.
Baking powder (1 tsp): Adds a little extra lift to the sponge for a fluffy consistency.
Walnuts (100 g): Roughly chopped for the batter with some halves reserved to decorate the finished cake, walnuts introduce lovely crunch and nuttiness.
Icing sugar (320 g): Essential for the silky smooth, sweet buttercream frosting.
Double cream (85 ml, optional): Whisked with coffee into the buttercream for extra creaminess and a velvety finish.

TIP

You’ll find the full ingredient list, instructions, and print option in the recipe card below.

How to Make Coffee and Walnut Cake Recipe

Step 1: Preparing the Sponges

Start by preheating your oven to 170°C (160°C fan) and greasing two cake tins with butter, lining the bases with baking paper to ensure your cake comes out cleanly. Then, dissolve the instant coffee granules in a tablespoon of boiling water to create a smooth, thick coffee mixture that will bring that punch of flavor to your sponge. Next, beat the softened butter and sugar together until the mixture turns pale and fluffy – this aeration makes the cake light and tender. Gradually add beaten eggs one by one, blending well after each addition. Stir in your coffee mixture carefully, even if it looks like it’s curdling a bit—it will come together beautifully in the end.

Step 2: Mixing the Batter

Sift in the self-raising flour and baking powder to your wet mixture and combine on a low speed to avoid overmixing. Fold in the chopped walnuts, saving a few halves for decorating the cake later. Dividing the batter evenly between your prepared tins ensures even baking and a uniform result.

Step 3: Baking

Bake the cakes for 25 to 30 minutes, checking for doneness by inserting a skewer into the center – if it comes out clean, your sponges are ready. Let them cool in the tins for 10 minutes to set, then transfer to a wire rack to cool completely before you move on to the fun part: frosting!

Step 4: Making the Coffee Buttercream

Create a luscious frosting by beating softened butter with icing sugar, adding the sugar slowly to avoid a powdered mess. Meanwhile, mix another tablespoon of instant coffee with boiling water and whisk it with double cream if you’re using it—this will make your buttercream smooth and creamy with a deep coffee flavor. Mix the coffee cream blend into the butter and sugar, scraping down the bowl as needed until you have a glossy, thick buttercream ready to spread or pipe.

Step 5: Assembling Your Coffee and Walnut Cake Recipe

If you want perfectly flat layers, gently level the sponges with a serrated knife, or simply turn them upside down for a flat surface. Place one sponge on your serving plate, spread or pipe a generous layer of buttercream on top, then add the second sponge. Cover the entire cake with the remaining frosting and adorn the top with reserved walnut halves. Now it’s ready to slice and enjoy, a perfect centerpiece for any gathering or a decadent solo indulgence!

How to Serve Coffee and Walnut Cake Recipe

A round, two-layer cake with smooth light brown frosting covering the whole cake sits on a white cake stand. The frosting has a slightly matte texture with some faint swirls and creases visible on the surface and sides, showing the darker brown cake layers through in places. In the foreground, there is a piping bag filled with the same light brown frosting, lying on a white marbled surface. The background is softly blurred with a white marbled texture. photo taken with an iphone --ar 4:5 --v 7

Garnishes

This cake shines when topped with crunchy walnut halves, providing a beautiful natural decoration that hints at the flavors inside. For an extra touch, try gently dusting the top with a sprinkle of cocoa powder or a few coffee beans for an elegant finish that will impress your guests.

Side Dishes

Serve this cake alongside a cup of strong black coffee or a silky latte to echo the cake’s rich coffee notes. A dollop of lightly whipped cream or a scoop of vanilla ice cream also complements its deep flavors, turning your slice into a satisfying dessert.

Creative Ways to Present

Elevate your presentation by slicing the cake into petite squares for a dainty afternoon tea setup or layering it in dessert glasses with alternating coffee-soaked sponge pieces and buttercream for an upscale coffee trifle. Whichever way you choose, that irresistible coffee and walnut flavor will shine through.

Make Ahead and Storage

Storing Leftovers

If you happen to have leftovers (though unlikely!), wrap the cake tightly in cling film or store in an airtight container to keep the buttercream moist and the sponge fresh. It will stay delicious for 3 to 4 days at room temperature, perfect for savoring over several coffee breaks.

Freezing

You can freeze both the un-iced sponges and the fully assembled cake. For the sponges, wrap well in cling film and foil; they freeze beautifully for up to 2 months. For the assembled cake, freezing is possible but might slightly affect the buttercream texture. Thaw carefully at room temperature before serving.

Reheating

This cake is best enjoyed at room temperature. If you prefer your coffee flavors warm, gently warm a slice in the microwave for 10-15 seconds but avoid overheating to keep that perfect moist texture intact.

FAQs

Can I use ground coffee instead of instant coffee for this Coffee and Walnut Cake Recipe?

Instant coffee is preferred here because it dissolves completely and disperses evenly in both sponge and buttercream. Ground coffee won’t dissolve well and could leave gritty bits, so it’s not recommended for this cake.

Is there a substitute for self-raising flour in the recipe?

If you don’t have self-raising flour, simply mix 250 grams of plain flour with 2 teaspoons of baking powder to achieve the same leavening effect for your sponge.

Can I make this recipe gluten-free?

Yes! Use a gluten-free self-raising flour blend to replace the usual flour. Just make sure your baking powder is gluten-free as well for the best results.

How do I prevent the buttercream from looking grainy?

Ensure your butter is fully softened and add icing sugar gradually while beating to avoid clumps. Sifting the icing sugar before beating can also help achieve a smooth and glossy buttercream.

Can I use chopped pecans or almonds instead of walnuts?

Absolutely! While walnuts are traditional and give a distinct flavor, pecans or almonds would add their own lovely crunch and nuttiness to the cake, so feel free to substitute according to your taste.

Final Thoughts

This Coffee and Walnut Cake Recipe is a true classic that never fails to delight with its rich, comforting flavors and irresistibly moist texture. It’s the kind of cake that invites everyone to take a moment, savor the blend of coffee and crunchy walnuts, and feel perfectly satisfied. I hope you give this recipe a try and discover just how easy it is to create a café-quality cake right in your own kitchen. Happy baking!

Coffee and Walnut Cake Recipe

Ingredients You’ll Need