A Slice of Nostalgia – The Magic of Coffee & Walnut Cake ☕🌰

There’s something truly magical about the first bite of a Classic Coffee & Walnut Traybake—soft, buttery sponge with a rich hint of coffee, that sweet crunch of walnuts, and a silky coffee buttercream on top. Honestly, it’s everything you need alongside your morning cuppa or an afternoon treat.

This bake always reminds me of cozy kitchens, clinking teacups, and the gentle hum of conversation. It’s one of those timeless British bakes that feels like a warm hug. No wonder it’s been a staple at tea tables across the country since the 19th century!

In the past, walnuts were considered a bit of a luxury item, so adding them to your cake was a sure way to impress guests. And while nowadays we can enjoy walnuts any time we please, this traybake still feels every bit as special.

The best part? It’s incredibly easy to make. No complicated techniques, no fancy ingredients—just good old-fashioned baking at its best.

Let’s get right into it!

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Ingredients You’ll Need:

For the Sponge:

• 225g butter, softened

• 225g light brown sugar

• 4 large eggs

• 1 tsp vanilla extract

• 225g self-raising flour

• 2 tbsp instant coffee dissolved in 1 tbsp hot water

• 100g walnuts, chopped (plus extra for topping)

For the Coffee Buttercream:

• 150g butter, softened

• 300g icing sugar

• 1 tbsp instant coffee dissolved in 1 tsp hot water

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Step 1: Get the Oven Ready

Start by preheating your oven to 180°C (fan). Then, grease and line a 20x30cm traybake tin with parchment paper. (You’ll thank yourself later when it comes to lifting out that beautiful sponge!)

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Step 2: Make the Sponge

In a large bowl, cream together the softened butter and light brown sugar until it’s light, fluffy, and pale. This usually takes about 3-4 minutes with an electric mixer, but you can definitely do it by hand if you’re feeling old-school.

Next, beat in the eggs one at a time, making sure each one is fully incorporated before adding the next. Stir in the vanilla extract.

Gently fold in the self-raising flour using a spatula or wooden spoon. You want to keep as much air in the batter as possible to get that lovely fluffy texture.

Now, add the dissolved coffee and chopped walnuts. Give it all a good but gentle stir to evenly distribute that delicious coffee flavor and crunchy nuts.

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Step 3: Bake It

Spread the batter evenly into your prepared tin and smooth the top. Pop it into the oven and bake for 25–30 minutes, or until the sponge is golden, springy to the touch, and a skewer inserted into the center comes out clean.

Let the sponge cool completely in the tin before you move on to the buttercream (and believe me, the waiting is the hardest part!).

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The Best Buttercream + Handy Tips for Success 🍰

Step 4: Make the Coffee Buttercream

While the sponge is cooling, it’s time to whip up that dreamy coffee buttercream.

In a large bowl, beat the softened butter until it’s smooth and creamy. Gradually add the icing sugar a little at a time (to avoid a sugar cloud!), beating well after each addition.

Finally, stir in the dissolved coffee. The buttercream should be light, fluffy, and packed with coffee flavor—just like the perfect café latte.

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Step 5: Assemble and Finish

Once the sponge is completely cool, spread the buttercream generously over the top using a palette knife or the back of a spoon. Don’t worry about it being perfect; the homemade look is part of the charm!

Scatter the top with a few extra walnut pieces for a lovely finish.

Slice into 12 squares and get ready to impress at your next tea break!

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Handy Tips for Perfect Results:

💡 Stronger coffee flavor? Swap instant coffee for espresso powder for an even bolder taste.

🌰 No walnuts on hand? Pecans make a great substitute, or you can leave them out altogether for a pure coffee sponge.

🔥 Storage: Store your traybake in an airtight container at room temperature for up to 3 days—if it lasts that long!

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Serving Suggestions:

• Serve a square with your morning coffee for the ultimate pick-me-up.

• Add a dollop of whipped cream for a bit of extra indulgence.

• Pack a slice into lunchboxes for a sweet surprise.

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FAQs and Sweet Goodbyes 🎶

Frequently Asked Questions:

Q1: Can I freeze the coffee & walnut traybake?
Yes! Freeze the un-iced sponge wrapped well in cling film for up to 2 months. Defrost fully before icing.

Q2: Can I use real brewed coffee instead of instant?
You can, but use very strong brewed coffee and keep the liquid amount small to avoid a soggy sponge.

Q3: Can I make this gluten-free?
Yes! Substitute with a gluten-free self-raising flour blend. Just be careful not to over-mix the batter.

Q4: How do I know when the cake is done?
It should be golden on top, spring back when lightly pressed, and a skewer inserted into the middle should come out clean.

Q5: Is it better with butter or margarine?
Butter gives a richer flavor, but a good-quality baking margarine works fine too if you prefer.

Q6: Can I make it into cupcakes?
Absolutely! Spoon the batter into cupcake liners and bake for about 18–20 minutes instead.

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Wrapping It Up

And there you have it—a slice of pure comfort with this Classic Coffee & Walnut Traybake. It’s buttery, nutty, just the right amount of sweet, and completely irresistible. Whether you’re hosting afternoon tea, baking for a loved one, or just treating yourself (which you totally deserve), this traybake will never, ever disappoint.

Don’t forget to pop the kettle on and enjoy a square (or two)! ☕🌰

Let me know if you try it—I love hearing about all your delicious baking adventures!

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