Irresistible Classic Coffee and Walnut Traybake Cake | 7 Reasons It’s a WI Favourite

First off, thank you for being here, because you’re about to bake a true British icon with me: the Classic Coffee and Walnut Traybake Cake. This isn’t just any bake; it’s the one that takes center stage at village halls, WI meetings, and family tea tables. Think tender coffee-scented sponge, topped with creamy coffee buttercream and crowned with golden walnuts. Every square is like a little bite of nostalgia.

This traybake is my ode to Sunday teas at Gran’s and those endless pots of proper tea. If you love coffee, walnuts, or just a classic bake that never disappoints, you’ll be smitten. Don’t forget — if you’d like more recipes like this one, you can subscribe to my email list and get cozy bakes delivered straight to your inbox.

Overview of Recipe Content

• What is it?
  A coffee and walnut cake transformed into an easy-to-slice traybake. Perfect for sharing at parties, school bakes, or Sunday teas.
• Why you’ll love it
  It’s simple, comforting, and utterly delicious. Plus, it cuts into neat squares that are ideal for sharing.
• What it tastes like
  Moist sponge with the deep, slightly bitter edge of coffee balanced by nutty crunch and sweet, silky buttercream.
• When to make it
  It’s wonderful all year round, but especially cozy in autumn or winter.

Ingredients for the Sponge

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• 200g unsalted butter, softened
• 200g light brown sugar
• 4 large eggs
• 200g self-raising flour
• 2 tbsp instant coffee granules dissolved in 2 tbsp hot water
• 100g walnuts, chopped

For the Buttercream

• 150g unsalted butter, softened
• 300g icing sugar, sifted
• 2 tbsp instant coffee dissolved in 1 tbsp hot water
• Walnut halves, for topping

Tools Needed

• 9×13-inch traybake tin
• Electric mixer or whisk
• Mixing bowls
• Spatula
• Cooling rack

Suggested Substitutions

• Swap walnuts for pecans or hazelnuts.
• Use decaf coffee if you want less caffeine.
• Try a mascarpone topping instead of buttercream for something lighter.

How to Make Coffee and Walnut Traybake Cake

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1. Preheat your oven to 180°C (350°F). Grease and line your traybake tin.
2. Cream the butter and sugar until pale and fluffy. This is where the sponge gets its lift, so take your time!
3. Beat in the eggs one at a time, adding a spoonful of flour if the mixture curdles.
4. Fold in the flour, dissolved coffee, and chopped walnuts until you have a smooth batter with little nutty flecks.
5. Bake for 25–30 minutes, or until a skewer comes out clean. Let cool completely on a rack.
6. Make the buttercream: Beat butter until creamy, then add icing sugar gradually. Mix in dissolved coffee.
7. Spread buttercream over the cooled sponge and cut into squares.
8. Top with walnut halves — each square gets its crown!

What to Serve with Coffee and Walnut Traybake Cake

• A pot of strong English breakfast tea (classic WI style).
• A latte or cappuccino if you want to double down on coffee.
• Fresh fruit on the side for balance.

Tips for Making It Perfect

• Use room temperature ingredients for the fluffiest sponge.
• Don’t overbake — the sponge should be soft and moist.
• Dissolve coffee granules fully in hot water to avoid graininess.
• For clean cuts, chill the traybake before slicing.

Storage Instructions

• Store in an airtight tin at room temp for up to 3 days.
• Refrigerate if warm, but bring to room temp before serving.
• Freeze (without buttercream) for up to 2 months.

General Information

Coffee and walnut cake is a British baking classic, with roots in WI competitions and Sunday tea traditions. This traybake version is easier to transport and share — no fussy layers, just comforting squares.

Frequently Asked Questions

Can I make this gluten-free?
Yes, use a good-quality self-raising gluten-free flour blend.

Can I use fresh brewed coffee instead of instant?
Instant coffee gives a stronger punch. Brewed coffee is milder but works.

Can I halve the recipe?
Yes, bake in an 8-inch square tin instead.

How do I make the buttercream less sweet?
Swap half the icing sugar for mascarpone or cream cheese.

Conclusion

This Classic Coffee and Walnut Traybake Cake is a slice of tradition — simple, nostalgic, and always a crowd-pleaser. Whether for Sunday tea or a school fundraiser, it never fails. If you loved this, you might also enjoy my Chocolate Loaf Cake, Victoria Sponge Cupcakes, Sticky Toffee Pudding, Carrot Cake Traybake, or Lemon Drizzle Cake.

Happy baking, and don’t forget to brew a pot of tea!

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Interactive Elements

💬 Leave me a comment below: Are you a “hint of coffee” or “stronger the better” baker?
📌 Share your bake on Pinterest and tag me!

Nutritional Information (per serving, based on 16 slices)

Calories	Protein	Carbs	Sugar	Fat	Saturated Fat	Fiber	Sodium
310	4g	38g	26g	16g	8g	2g	140mg

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