January 5, 2024
Coffee Walnut Loaf Cake!
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A classic bake in loaf cake form… what more could you want?! A coffee and walnut studded sponge with a smooth coffee buttercream frosting. YUM.
Coffee
I adore coffee now, but usually iced I won’t lie. I didn’t drink coffee until a couple of years ago, and now I adore all iced coffee, and I’m gradually learning to love hot coffee as well. However, coffee cake?! That’s always been yummy.
I know so many people who are not coffee drinkers who would happily have a slice of coffee cake as there is just something about it that is a little bit different. It’s a lovely warming flavour almost and I just adore it.
In case anyone was wondering, an iced white mocha is my favourite. I am coming round to a coconut milk mocha though? Both are great drinks to have with a side of coffee and walnut cake, however.
For this bake, I used instant coffee. I always have it lying around for bakes as it’s easier, but you can swap it to 1-2 tsps coffee extract, or even use a double espresso shot from a coffee machine.
Coffee bakes
I have posted a few coffee based bakes on my blog now, but definitely nowhere near enough. I adore my coffee and walnut cupcakes which are basically a mini version of this loaf cake, as well as my coffee cake which is a chunk of a cake. Trust me, it’s huge.
I wanted to do a coffee loaf cake as it’s been one of the most highly requested bakes EVER for something that is so so simple and classic. It’s a cake that I think so many people will eat at a bakery or when they’re out for coffee and cake.
Coffee is also a brilliant addition to a chocolate fudge cake because it brings out the chocolate flavour in the chocolate cake – it’s a wonderful ingredient that adds a delicious depth.
Loaf cakes
Loaf cakes are one of my favourite cakes to make. They are easy to pour into the correct tin, easier to decorate as they are so much simpler, and they always look like fun. They can be slightly annoying to photograph, but that’s no worries.
One slight annoyance with the actual baking process of a loaf cake however is that NO 2lb loaf tin is the same size. I know, this may sound ridiculous… but I recently bought 12 different loaf cake tins so that I could compare, and they were all different. Some, even though named the same size, could fit half of the volume of cake mix.
Because it’s so inconsistent, I always test my recipes using this 2lb loaf tin to make it easier. However, when making these cakes, make sure not to fill past 2/3 full so it doesn’t overflow. Any spare cake mix, if your tin is smaller, can be used to make cupcakes (they take 20 minutes to bake at 160ºc).
Some of my favourite loaf cakes I’ve made using this tin are my white chocolate and raspberry loaf cake, my chocolate orange loaf cake and my baileys chocolate fudge loaf cake – but this one? This coffee walnut loaf cake is definitely up there with one of my new favourites.
The cake
- Butter – for the butter, you can use a baking spread or a block butter – both work well for the cake.
- Sugar – because this is a coffee cake, I use brown sugar as it brings out the coffee flavour even more
- Flour – self raising flour, as it’s for a cake. You can use plain flour of the same weight though, and mix in 2 level tsps baking powder per 150g of plain flour
- Eggs – I always use medium eggs, so I used four eggs for this.
- Coffee – I used a good quality instant coffee, but as mentioned above, you can use other coffee.
- Walnuts – I use chopped walnuts so it’s smaller pieces spread throughout the cake mix
Decoration
The decoration is so easy when it comes to a loaf cake. I tend to always use my favourite piping tip, and swirl the buttercream in a rope like format across the cake in lines. You can of course just dollop the frosting on and spread, or pipe it in a different way.
- Butter – you must use block butter for the frosting, and not a spread.
- Sugar – I use icing sugar, of course.
- Coffee – as with the cake, I used instant coffee dissolved in water, but you can use others.
- Walnuts – I kept some as halves, and some chopped
- Sprinkles – because why not?!
Tips and tricks
- This bake will last for 4+ days at room temperature
- You can freeze this bake for 3+ months
- I use this 2lb loaf tin – if yours is smaller, only fill the tin 2/3 full.
- You can swap it to 1-2 tsps coffee extract, or even use a double espresso shot from a coffee machine.
- I use this piping tip
- I use these piping bags

Coffee Walnut Loaf Cake
Ingredients
Cakes
- 225 g unsalted butter/baking spread
- 225 g light brown soft sugar
- 225 g self raising flour
- 4 medium eggs
- 2 tsps instant coffee (dissolved in 2tsps boiling water)
- 125 g walnuts (chopped)
Buttercream
- 150 g unsalted butter
- 300 g icing sugar
- 2 tsps instant coffee (dissolved in 2tsps boiling water)
Decoration
- walnuts (chopped)
- sprinkles
Instructions
Cake
- Preheat your oven to 180ºc/160ºc fan and line a 2lb loaf tin
- Beat together the unsalted butter and sugar until light and creamy
- Add in the flour and eggs and beat again. Add the dissolved coffee and mix
- Stir through the chopped walnuts and pour into a lined tin. Bake the cake for 55-65 minutes
- Once baked, leave to cool fully.
Buttercream
- Beat the unsalted butter on its own to loosen
- Add the icing sugar and beat together
- Add the dissolved coffee and mix
Decoration
- Add the buttercreams to a piping bag and decorate
- Add some chopped walnuts and sprinkles and ENJOY!
Notes
- This bake will last for 4+ days at room temperature
- You can freeze this bake for 3+ months
- I use this 2lb loaf tin - if yours is smaller, only fill the tin 2/3 full.
- You can swap it to 1-2 tsps coffee extract, or even use a double espresso shot from a coffee machine.
- I use this piping tip
- I use these piping bags
ENJOY!
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J x
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What other topping could you make if you don’t like buttercream?
Can I make this minus the coffee without the need to make any adjustments to the rest of the recipe?
Can I use salted butter
Hi can I use this recipe in a 20cm round cake tin instead?
How would I do this in a 2 layer 8inch cake please
I made this cake step by step but it has come out verrrry oily, do you know what I done wrong or is it supposed to be like this x
This may be the butter you used, which one was it? It is a moist cake so it may also just be moist!
It’s a really nice moist cake with plenty of yummy Buttercream. Will make this again & again!
Would your coffee recipes work using DECAF?
Yes, they would!
This coffee and walnut loaf cake sounds delicious! I love how coffee enhances the flavor. Can’t wait to try it!
Turned out perfectly. Lots of nuts with a mixture of finely and coarsely chopped.. When slightly warmed even better (take off the buttercream icing first). I also added the caramelised 1/2 walnuts on the top for a bit of crunch. But the coffee has to expresso not instant; instant isn’t strong enough.
Great recipe but definitely makes more mix than will fit a 2lb loaf tin so have some cupcake cases ready. I always double the quantity of coffee powder which gives a really well defined flavour.
Hi I want to make this cake as a tray bake what would the quantities be? I love your recipes Jane thank you xx
It was delicious but quite dense. Any suggestions on what I did wrong? I measured everything out
Often this is purely for the baking time not being enough, or the mixture was over mixed! x
This cake is so easy to make. The texture, the combination of walnuts, coffee flavour (I used strong espresso coffee) and icing, all marries together deliciously and lasts well. My family n friends absolutely loved it. I have made it a quite a few times now and it always turns out perfect! Thank you so much Jane for sharing your recipe 🥳
I followed recipe to letter (assumed tsps indicates teaspoon?). My only negative is the coffee is not very evident. I used 2xtspn granulated nescafe gold blend in 2x tspn boiling water. It smelt strong but doesn’t taste hardly at all. I was going to get 2 x espressos from café but worried the extra liquid would affect the recipe. There is no liquid in recipe at all to adjust. I was tempted to mix the coffee with butter but decided to follow the recipe.
Yes, teaspoons. It likely is that your coffee just isn’t strong enough when baked – a strong 1 shot espresso should be fine x
I only have large eggs, would using 3 large eggs instead of 4 medium work?
Lovely cake but I would suggest adding more coffee
I’m going to experiment with pecan nuts & Nespresso pecan coffee.
Could you make this the same way but take out the walnuts?
Of course!
How would these be measurements be for 2 layer 6 inch cake? Would I need more?
Can I add dates to this recipe without changing anything else?
Can you add dates without having to change any other ingredients or cooking times?
Yes, that should be fine!
Would you do 1 double shot espresso from a coffee machine split over the cake and buttercream or a double shot for each? I’m worried it would be too much liquid, or would you take 2tsps from the double shot in place of the instant coffee? Thanks in advance! 😍
For the cake a double shot is fine, for the frosting its best to slowly add it as you mix to prevent adding too much liquid! x
I’m not the best at baking cakes but this turned out lovely ☺️
Can u do this without using the coffee as I love walnuts but hate coffee
It’s a coffee and walnut cake the hints in the name.
The flavour is lovely but my cake was quite dense. I mixed it until it was just combined and baked for 55 mins. I can only think my oven runs hot so should have taken it out earlier, but never mind!
Dense cakes can often mean they are still slightly underbaked, or you used cold eggs in the cake mix! x
Love this cake!!!!! As I love all your cakes :). Can you freeze it with the buttercream on?
Yes, you can!
Hi wanting to make this for first time , what is best coffee to use please
Absolutely delicious and I love the fact there’s nuts in every slice unlike other recipes!
All proper basic ingredients . Looks yummy.
Must try very soon!
Could you use this recipe and bake it in two round sandwich tins instead of a loaf tin?
Is there anything to substitute the walnuts for. Its a family favourite but no on elijes walnuts
Any other nut works! x