Contains Affiliate Links
Easy Coffee Cake – A delicious all-in-one coffee sponge topped with smooth coffee buttercream. Simple to make and packed full of flavour.
PLUS – How to make this cake in any size of round, square or rectangular tin.
Last week I shared with you my recipe for Easy Chocolate Cake, and today I’m back with another simple, classic cake recipe – Coffee Cake topped with Coffee Buttercream.
Two big cake recipes in a row?
Yes. I realised that I have so many more cupcakes on here than full-sized layer cakes. The reason for this is that I almost always test new cake recipes as cupcakes, as it’s easy to make small batches making lots of little tweaks until the recipe is just perfect. As soon as the recipe is just right, I’ll share it on here and move onto the next one.
I decided it was about time that some of those cupcakes were transformed into big cakes, so I’m on a mission to supersize them all for you.
One of the reasons I love this coffee cake recipe is that both the sponge and the buttercream are absolutely jam-packed with coffee flavour.
Coffee is one of my absolute favourite cake flavours, and I struggle to resist buying a slice if I spot one in a coffee shop. However, sadly I’ve noticed that quite a few lack coffee flavour in the actual sponge, there’s the subtlest hint, but all the coffee flavour is in the icing. Not so with this cake, both the sponge and buttercream are packed full of flavour.
Can I use freshly brewed coffee rather than powder or granules?
No, the reason I use instant coffee powder or granules in this recipe is that it’s the easiest way to get an intense coffee flavour into both the sponge and buttercream. The amount of freshly brewed coffee needed would mean adding too much liquid to the mixture.
You also cannot substitute the coffee powder/granules for ground coffee beans. Making this substitution wouldn’t give the same flavour (as they need brewing to bring out the flavour) as the coffee beans wouldn’t dissolve into the mixture, so you’d end up with bitty cake and buttercream.
I only have coffee granules, how do I grind them into a powder?
I always use granules rather than powder and I simply give mine a quick blitz in my spice grinder. You can also grind them in a pestle and mortar.
Can I use decaf coffee?
Absolutely. We mostly drink decaf coffee at home and so that’s what I usually use for my cakes. The results of using regular instant coffee and decaf are the same.
Can I use self-raising flour instead of plain?
Absolutely. Instead of the 200g of plain flour and 2½ tsp of baking powder listed in the recipe, use 210g of self-raising flour.
Other recipe inspiration for coffee lovers
If you’re like me and love coffee flavoured treats then take a look at some of my other coffee-filled recipes:
- Caramel Macchiato Cupcakes – coffee cupcakes topped with whipped cream and a hidden caramel centre
- Coffee & Walnut Cake
- Cappuccino Truffles
- Coffee Cupcakes
What’s the best way to store my coffee cake?
This coffee cake can be stored in an airtight container for 4-5 days. Preferably it should be stored in the fridge (but allow it to come up to room temperature before eating as it’ll have a better flavour and the buttercream will soften), but it’ll be fine at room temperature providing the room isn’t too warm.
This cake is suitable for freezing, either just the coffee sponge or the buttercreamed cake. To freeze the coffee sponge cake, wait for it to cool and then wrap the cake in clingfilm or store it in an airtight container before freezing. Defrost it thoroughly before decorating.
The buttercreamed cake can also be frozen in the same way. If you’ve piped the cake beautifully and you’re worried about squashing it when you wrap it in buttercream simply freeze the cake uncovered on a dish for an hour to firm up the buttercream. Then wrap it in clingfilm. As the buttercream is already solid, it won’t get squashed. When you want to defrost the cake, remove it from the freezer and remove the clingfilm (so it doesn’t stick to the buttercream as it thaws).
I would not recommend freezing just the buttercream to use later as the consistency becomes a little too fudgy. This means it’s delicious on the cake but tricky to spread or pipe.
What are the coffee cake ingredients for a different size of tin?
As for my easy chocolate cake, I wanted to make it simple for you to make this cake in a different size or shape (either round, square or rectangular) so you can get it to fit in a tin you already have at home or feed as many or few people as you need.
The main recipe below is for a two-layer 20cm round cake (this serves 12 people). However, this recipe is easily adapted to use other sizes of tins.
To find the ingredients needed to make this cake in a different size, simply add the dimensions of your tin and the number of layers into the boxes below and hit “Calculate”.
Round Cake
Cake Diameter (cm)
Number of Layers
Cake Ingredients
0 g plain flour
0 tsp baking powder
0 tsp coffee powder/granules
0 medium egg(s)
0 g soft margarine or butter
0 g soft light brown sugar
0 tsp milk
0 tsp salt
Buttercream Ingredients
0 g butter
0 g icing sugar
0 tsp vanilla extract
0 tsp instant coffee powder/granules
0 tsp boiling water
Square or rectangular cake
Cake Size (cm)
x
Number of layers
Cake Ingredients
0 g plain flour
0 tsp baking powder
0 tsp coffee powder/granules
0 medium egg(s)
0 g soft margarine or butter
0 g soft light brown sugar
0 tsp milk
0 tsp salt
Buttercream Ingredients
0 g butter
0 g icing sugar
0 tsp vanilla extract
0 tsp instant coffee powder/granules
0 tsp boiling water
FREE GRAMS TO CUPS CONVERSION CHARTS
Subscribe to the Charlotte's Lively Kitchen mailing list to get your FREE printable grams to cups and cups to grams conversion charts for twelve popular baking ingredients
Easy Coffee Cake
INGREDIENTS
For the coffee sponge
- 3 tbsp instant coffee powder - or coffee granules ground to a powder
- 200 g plain flour
- 2½ tsp baking powder
- 220 g soft light brown sugar
- 220 g margarine or butter - butter must be soft at room temperature
- 4 medium eggs
- 2 tsp milk
- ⅛ tsp salt
For the coffee buttercream
- 200 g butter - soft at room temperature
- 400 g icing sugar
- ¼ tsp vanilla extract
- 8 tsp instant coffee powder or granules
- 4 tsp boiling water
- A little milk
This recipe is for 2x 20cm round sandwich tins. To find the ingredients for a different size of tin please use the calculator above the recipe.
INSTRUCTIONS
Make the coffee sponge
- Pre-heat your oven to 160ºC/140ºC fan.
Line two 20cm round sandwich tins with greaseproof paper or re-usable baking tin liners (I use these tins and these liners). - Put all of the cake ingredients into a large bowl (3 tbsp coffee powder, 200g plain flour, 2½ tsp baking powder, 220g soft light brown sugar, 220g margarine or butter, 4 medium eggs, 2 tsp milk, ⅛ tsp salt). Beat with an electric mixer or by hand on a low speed until all of the ingredients are combined.
- Split the mixture between the two prepared tins. Then bake for 30-35 minutes until a skewer inserted in the centre comes out clean.
- Once the cakes are cooked, remove them from the oven. Leave them to cool in their tins for about 10 minutes before removing them from the tins and moving them to a wire rack to cool completely.
Make the coffee buttercream
- While the cakes are cooling make the coffee buttercream. Start by mixing together the instant coffee powder/granules (8 tsp) with the boiling water (4 tsp). Set aside to cool.
- In a large bowl beat the butter (200g) and vanilla extract (¼ tsp) on a low speed until soft. Add the icing sugar (400g) and beat on a low speed until combined with the butter and smooth. Gradually add the coffee mixture, 1 tsp at a time. After each addition beat the buttercream until the coffee has been fully combined before adding more.
- Check the consistency of your buttercream. It should be soft enough that you could spread it onto a slice of bread. If it is too firm, then add a little milk (no more than 1 tsp at a time) until it is your desired consistency.
Build the cake
- Place the bottom layer of your coffee sponge onto your serving dish. Spread about ⅓ of the coffee buttercream evenly across the sponge (I like to use a palette knife, but you could use a regular knife or the back of a spoon).
- Add the top layer of sponge. Again spread ⅓ of the coffee buttercream on top. Put the remaining buttercream into a piping bag fitted with a large star nozzle (I use a JEM1B nozzle). Pipe 12 blobs of buttercream evenly spaced around the edge of the cake. I give the piping bag a little wiggle as I squeeze so that the buttercream looks slightly ruffled.Of course, if you don't fancy piping, simply split the buttercream even between the middle and top of the cake.
- Serve
NOTES
NUTRITIONAL INFORMATION
Any nutritional information provided is the estimated nutritional information per serving. Please refer to my guide to Charlotte’s Lively Kitchen nutritional information if you would like to learn more about how this is calculated.
Free From/Suitable For
The ingredients I used to make this recipe are all free from the following allergens. However, please check any labels carefully for allergens you need to avoid as brands can vary, and product recipes can change over time.
- Suitable for Vegetarians
- Tree Nut-Free
- Peanut-Free
- Sesame-Free
- Soya-Free
- Sulphur Dioxide & Sulphite-Free
- Lupin-Free
Adam Lea says
I wanted to make this cake with three tiers, 20cm diameter which your calculator conveniently tells me how much of each ingredient to use. I wanted to add walnuts to the recipe to turn it into a coffee and walnut cake, for which you have a recipe, but that one doesn’t have a calculator. When cross-checking the two recipes, I noticed for a three tier coffee cake with 20 cm tins, the quantity of ingredients is double that for the three tier coffee and walnut cake with 18 cm tins. The increase in volume going from an 18 cm tin to a 20 cm tin for the same depth is only about 25%, so why does the quantity of ingredients double?
Charlotte Oates says
The layers in the coffee and walnut cake are designed to be thinner than a standard layer so they use less mixture.
Chris says
I love this coffee cake recipe and make it often.
Turns out lovely each time.
Really can appreciate the coffee flavour, best I have had.
I have just baked a chocolate cake with coffee frosting, which is divine.
I looking forward to baking some more Charlottes recipes now.
Lumi says
Added a dash of whisky to the batter. Replaced half the eggs with yoghurt for extra moisture and realised I didn’t have enough icing sugar for the coffee buttercream but this gave it a nice bitter kick.
Kj says
Great cake recipe and the best icing – although I only make 3/4 as it is a lot!
Shinji says
Made this cake yesterday and it turned out great! The recipe was easy to follow and we had most of the ingredients already, so the whole process was a piece of cake Thanks so much for sharing this!
Mary says
Excellent
Claire says
Baked this cake today & it is a delicious cake, super soft & you can taste the coffee in the sponge which is hands down better than any other recipe for coffee cake I’ve tried . The Buttercream is smooth & strong in coffee flavour so a definite HIT if your a coffee lover , will definitely make this cake over & over again everyone loved it .
Kate says
Hi, found I didnt quite have enough butter for your recipe so i substituted the rest with greek yoghurt and it came out fabulous. Very moist and full coffee flavour. |Made for my sons birthday, who is a coffee cake connoisseur! Will definitely use this recipe again.
Christine says
Hi, I’m using this recipe to do my sons wedding cake. I will be making a 30cm,25cm and 20cm all 4 tier and was just wondering
How long I should bake each for please? I will make 2 cakes and split each one to make the 4 tiers required
Charlotte Oates says
I would highly recommend making some practise layers and testing the time for each size in your tins and in your oven because both things can make a difference anyway. I would also recommend checking the thickness of the layers are as you wish as each layer in this cake as written isn’t very thick – you may struggle to cut each in half.
Blue says
Another great recipe. I am not huge on coffee cake and found it rather sweet, but my friend who is a coffee cake afficionado loved it so it’s definitely done its job! Made it dairy free and it worked just fine. Thank you for the recipe.
Also, thank you for being one of the rare recipe sites with actual functionality and that isn’t written by AI! Your calculator is really useful, I appreciate the simplicity of this comment box and the brevity and clarity of your writing is great. Thanks for providing a high-quality website on an increasingly difficult-to-use internet. You will be my first port of call for recipes from now on!
Janhavi says
holy hell this cake was SO GOOD.
for context, im 17 and i hadnt baked a cake all by myself, ever, before this. and it was a raging success!! my dad started chemo yesterday so i thought i’d make him something to boost his spirits a little, and he loved it- it was super moist, not too sweet and the coffee flavour was actually really nice
thanks for this wonderful recipe<3
Charlotte Oates says
Well done, I hope this is the first of many homemade cakes that you and your dad will share together x
Ruth Foster says
Baked beautifully, tasted delicious, perfect! Thank you.
Claire says
So I dropped my phone in a lake which had this recipe bookmarked and I’ve just found it again! Love this recipe. So delicious. I’ll be making it for my dads birthday tomorrow.
PS says
I had to come back to comment, because I baked with this recipe twice, and both times it was so delicious!!!
I was quite nervous about it from the comments and also I am scared about the whole over-under mixing but this cake was was so simple. I did amend it slightly where I put the butter first to fluff it up, and then combined it with sugar, but I’m sure it would have been fine either way. The bake time was so quick, and for the first time I actually thought about the proportion of ingredients to my cake pan (why haven’t I done this before!)
My cake turned out amazing, no bumps or craters.
Will be exploring for your other recipes now, thanks again!
Sindhu Koshy says
Can i get the measurements of eggs in grams
Charlotte Oates says
You can check my Eggs: Does Size Matter? guide for information on how much eggs of different sizes weigh.