This white chocolate mud cake is stupidly moist, ridiculously rich, and somehow still easy enough to pull off on a random Tuesday.
It's my go-to whenever I get handed cake duty for a birthday or a wedding, right up there with my Chocolate Mud Cake and Caramel Mud Cake.
A Quick Look At The Recipe
✅ Recipe Name: White Chocolate Mud Cake with White Chocolate Buttercream
🕒 Ready In: 20 minutes prep + 1 hour 45 minutes baking + cooling time
👪 Serves: 16 serves
🍚 Calories: 726kcal per serve
🥣 Main Ingredients: white chocolate, butter, caster sugar, flour
📖 Dietary Info: easily halved, freezer-friendly
⭐ Why You'll Love It: a fool-proof, low-and-slow mud cake with a smooth homemade buttercream, perfect for birthdays, weddings or just because.
SUMMARIZE & SAVE THIS CONTENT ON
This recipe is single-handedly THE best cake recipe I have ever used! I made it several times over several months before my brother's wedding to make sure it wasn't a fluke, and it's now my go-to any time anyone lets me choose the cake flavour.
- Nikita
My favourite thing about this cake is that it doesn't ask much of you. You melt, you mix, you wait (impatiently, in my case). If you're building out a proper cake rotation, try my Caramilk Mud Cake or Oreo Mud Cake next, or grab my How To Make Buttercream guide if frosting isn't your strong suit.
Jump to:
Why You're Going To Love This Recipe
- Melt and mix - no creaming, no fancy technique, just a saucepan and a whisk.
- Genuinely one of the most-loved recipes on my site. Over 200 five-star ratings and counting, including plenty of readers who've used it for wedding cakes.
- Freezer-friendly, so you can bake it well ahead of a big event.
- Dress it up with raspberries and coconut for a party, or leave it plain for a laid-back Sunday slice.
Mud Cake Ingredients
Simple pantry ingredients, but a couple are worth getting right.
Note: Scroll to the recipe card at the bottom for the ingredient quantities and full detailed method.
- White chocolate - use a good quality baking chocolate or a block you'd actually eat, not cheap compound chocolate. It melts smoother and won't split on you, and since white chocolate is the whole flavour here, cheap stuff really shows.
- Full cream milk gives the best moist result. Swap to a lower fat milk and the cake will still work, but it won't be quite as rich or moist.
Variations
- Wedding or tiered cake: plenty of readers have used this as a base for tiered and wedding cakes. Bake it in advance, freeze it well wrapped, then ice closer to the day.
- Fold fresh raspberries through the batter or scatter them on top for a fruity contrast to all that sweetness.
- Two-layer cake: double the cake batter, split between two tins, and add an extra layer of buttercream in the middle.
- Swap the white chocolate buttercream for a raspberry buttercream, or a simple chocolate ganache if you want less sweetness.
- Want the chocolate version instead? Make my Chocolate Mud Cake.
How To Make White Chocolate Mud Cake
Six steps, most of them just waiting.
Note: Scroll to the recipe card at the bottom for the ingredient quantities and full detailed method.
- Step 1: Prep your tin. Preheat the oven to 140°C fan-forced (325°F), then grease and line the base and sides of a 23cm round cake tin.
- Step 2: Melt it low and slow. Melt the white chocolate, butter, caster sugar and milk together in the microwave on 50% power, stirring every minute, until smooth. Set aside to cool.
- Step 3: Add the dry ingredients. Whisk through the plain flour, self-raising flour, eggs and vanilla extract until just combined.
- Step 4: Bake. Pour into the prepared tin and bake for about 1 hour 45 minutes, or until a skewer inserted in the middle comes out clean. Cool completely in the tin.
- Step 5: Make the buttercream. Melt the white chocolate and cool to room temperature. Beat the butter until pale and creamy, add the icing sugar a tablespoon at a time, then slowly beat through the cooled white chocolate.
- Step 6: Ice the cake. Once the cake is completely cool, turn it out onto a serving plate and spread the buttercream over the top and sides.
Recipe Tips
- Low and slow is non-negotiable. Mud cakes need a low oven and plenty of patience. If it's browning too fast, loosely cover the top with foil and keep baking.
- Wait until the cake is completely cool before icing it; otherwise, your buttercream will slide right off.
- Storage: keep it at room temperature in an airtight container for up to 4-5 days. Skip the fridge; it dries mud cakes out fast.
- Freezing: wrap the cooled, un-iced cake in plastic wrap, then foil and freeze for up to 3 months. Defrost overnight before icing. Frosted leftover slices also freeze well in an airtight container.
- Frosting too thick to spread? Beat through a splash of milk until it loosens up.
- New to buttercream? My How To Make Buttercream guide walks through the basics.
White Chocolate Mud Cake FAQs
It's a long bake at a low temp, so the top can catch before the middle's done. If it starts getting too dark, loosely lay a piece of foil over the top and keep baking until a skewer comes out clean.
Yes, and quite a few readers have. One even tested it several times before using it for her brother's wedding! Bake and freeze the layers ahead of time, then ice closer to the event once fully defrosted.
Store it at room temperature in an airtight container, not the fridge, or it'll dry out. It'll keep for 4-5 days. To freeze, wrap the cooled un-iced cake well and freeze for up to 3 months, then defrost overnight before icing.
Just beat through a small splash of milk until it loosens to a spreadable consistency. Add it a little at a time so you don't overdo it.
Definitely. A few on top for decorating won't change how you store it. But if you're layering raspberries through the middle of the cake, keep it in the fridge instead because of the extra moisture, then bring it back to room temp before serving.
More Mud Cake Recipes You'll Love
Once you've mastered the low-and-slow method, there's no stopping you. Here's a few more mud cakes worth trying:
White Chocolate Mud Cake
Ingredients
- 200 g white chocolate broken into pieces
- 350 g unsalted butter
- 590 g caster sugar
- 375 ml (1 ½ cups) milk
- 300 g (2 cups) plain flour
- 100 g (⅔ cup) self-raising flour
- 3 eggs
- 2 teaspoon vanilla extract or essence
- 200 g white chocolate broken into pieces
- 250 g unsalted butter
- 250 g icing sugar
Instructions
Conventional Method
- Preheat oven to 140 degrees celsius (fan-forced). Grease and line the base and sides of a 23cm round cake tin and set aside.
- Place the white chocolate, butter, caster sugar and milk into a microwave-safe bowl. Melt on 50% power, 3-4 minutes (stirring every minute) until melted and smooth. Set aside to cool.
- Whisk through the plain flour, self-raising flour, eggs and vanilla extract.
- Pour into the prepared tin and bake for approximately 1 hour and 45 minutes or until a skewer inserted into the middle comes out clean (see notes).
- Allow the cake to cool completely in the tin before removing to a serving plate.
- Once the cake has completely cooled, make the buttercream by melting the white chocolate (on 50% power, 2-3 minutes in the microwave - stirring every 30 seconds). Allow the chocolate to cool to room temperature.
- Using hand-held beaters, beat the room temperature butter until pale, smooth and creamy. Add the icing sugar (1 tbs) at a time and continue to beat until completely combined.
- Very slowly beat through the cooled (room temperature) white chocolate until smooth, creamy and spreadable (see notes).
- Spread the buttercream over the sides and top of the mud cake.
Thermomix Method
- Preheat oven to 140 degrees celsius (fan-forced). Grease and line the base and sides of a 23cm round cake tin and set aside.
- Place the white chocolate, butter, caster sugar and milk into the Thermomix bowl. Melt for 6 minutes on 50 degrees, Speed 2 (or until completely melted). Allow to cool.
- Insert the butterfly, and add the eggs and vanilla extract. Mix for 10 seconds, Speed 3.
- Add the plain flour and self-raising flour and mix for 10 seconds, Speed 3. Scrape down the sides of the bowl and repeat for a further 10 seconds or until combined.
- Pour into the prepared tin and bake for approximately 1 hour and 45 minutes or until a skewer inserted into the middle comes out clean (see notes). Allow the cake to cool completely in the tin before removing to a serving plate.
- Once the cake has completely cooled, make the buttercream by melting the white chocolate in a clean and dry Thermomix bowl for 3 minutes on 50 degrees, Speed 2. Allow the chocolate to cool to room temperature.
- In a clean and dry Thermomix bowl, insert the butterfly and add the chopped room temperature butter. Beat for 1 minute on Speed 4, or until pale, smooth and creamy. While the blades are still turning on Speed 4, add the icing sugar (1 tbs at a time) and continue to mix until completely combined. Slowly add the cooled white chocolate through the MC hole and mix on Speed 1 until smooth, creamy and spreadable (see notes).
- Spread the buttercream over the sides and top of the mud cake.
Skye says
What type of white chocolate did you use
Lucy Mathieson says
Hi Skye, I generally use Cabdury or Nestle baking melts 🙂
Nikita says
This recipe is singlehandedly THE best cake recipe I have ever used! I was on the search for the 'ultimate' white choc mud cake recipe about a year ago to make for my brother's wedding cake. I made this recipe several times over several months in the lead up to the wedding, to ensure it wasn't a 'fluke' and that it was indeed a fool-proof recipe - it is! It is now my go-to cake recipe any time anyone lets me choose the cake flavour. The cake got SO MANY amazing compliments, including several claims of 'this is the best cake I have ever tasted'! If you're wondering if this is the recipe you have been searching for, it is!
Thank you so much for sharing such a fool-proof recipe and for making it SO easy.
As a side note, I frosted the cake with an Ermine frosting to balance the sweetness a little bit and it was perfection! Topped the entire top of the cake with a ring of decorative piping and fresh raspberries for a luxe look and it was perfect!
Lucy Mathieson says
Thank you so much for taking the time to leave such an incredibly thoughtful review! 🥹 It honestly means the world to me.
I absolutely love that you tested the recipe several times before your brother's wedding to make sure it was reliable. Knowing it was the cake you trusted for such a special occasion is the biggest compliment I could receive.
I'm so thrilled to hear it was such a hit with your guests too! Hearing comments like "the best cake I've ever tasted" is just amazing.
And your finishing touches sound absolutely beautiful! The Ermine frosting would have balanced the sweetness perfectly, and the fresh raspberries must have made it look so elegant. I can picture it and it sounds stunning!
Thank you again for your kind words and for trusting my recipe for such an important celebration. 💕
Yvette says
Hello, what temp and how long if I bake in a 15cm cake tin?
Lucy Mathieson says
If you're baking the full recipe in a 15cm round cake tin, it will be far too much mixture and is likely to overflow. 😊
If you're halving the recipe, a 15cm tin is perfect. Bake it at the same temperature (140°C fan-forced) for around 1 hour 20 minutes to 1 hour 35 minutes. Start checking it from about the 1 hour 15 minute mark with a skewer.
If you're planning to use the full recipe, I'd recommend dividing it between two 15cm tins instead. They'll take approximately 1 hour 10-20 minutes to bake.
Ruby says
Wondering if I add raspberries how I should store the cake? Would it need to go in the fridge or will this still dry it out too much? Appreciate any advice!
Lucy Mathieson says
Absolutely! If you're just adding a few fresh raspberries on top for decorating, I'd still store the cake at room temperature in an airtight container and enjoy it within 1-2 days.
If you're adding a layer of fresh raspberries inside the cake or using lots of raspberries, I'd recommend storing it in the fridge due to the extra moisture and fresh fruit. Just bring it back to room temperature for an hour or so before serving, as mud cakes are always at their best when they're not cold.
The fridge can dry mud cakes out a little, but the fresh raspberries make refrigeration the safer option if they're incorporated into the cake. 😊
Abbey says
Would I be able to substitute the white chocolate with milk chocolate to make a chocolate mud cake
Lucy Mathieson says
Hi Abbey, I would definitely make this one if you're after a proper chocolate mud cake! https://bakeplaysmile.com/favourite-chocolate-cake/