Chocolate Swiss Meringue Buttercream - Lily Vanilli

Chocolate sprinkles cake

Chocolate Swiss Meringue Buttercream

Prep Time: 15 mins
Cooking Time: 10 mins

Simple go-to Chocolate Swiss Meringue Buttercream recipe with step-by-step instructions and tips to save time and make SMBC less scary


150g egg white
200g caster sugar
400g unsalted butter (this must be soft but not melted – no need to chop or cube this, I just soften the whole block. If a small amount is melted – don’t worry! add it in. If a lot is melted – you messed up (sorry!)  and need to redo it)
4 tbsp cocoa powder (you can leave this out for a plain buttercream, or add another flavour you like)


In the bowl of your stand mixer, whisk together your caster sugar and egg whites evenly.

Place this over a pan of simmering water to dissolve the sugar. You don’t need to mix this constantly, but keep an eye on it – it will take around 5 mins and you want to give it a mix from time to time. One thing that can go wrong in the making of smbc is overcooking your egg whites – avoid this by not letting the bowl get too hot, and by giving it the occasional stir.

It’s ready when the mixture is no longer grainy to the touch (rub some of the mixture between two fingers – if you can’t feel any crystals – it’s done! If you can feel even one little grain, it’s not ready – give it a bit longer)

Now transfer the bowl directly to your mixer, and with the whisk attachment whip it up on the highest speed, until you have stiff peaks.

(You have stiff peaks when you can lift up your beater and get a nice peak that stays put, holding its shape)

Now add all of your softened butter (you can add this at once, no need to add gradually), and beat again on high, until it all comes together evenly, and the butter is all mixed in

Add the cocoa (if using), then beat again on a low speed to mix it in – just so it doesn’t fly everywhere, then on a high speed just until it’s all evenly mixed in.

Now turn your mixer down to low, and let it whisk slowly until you have a smooth buttercream. This step helps knock out the air bubbles, so it’s smooth when you’re ready to ice. Always take this step just before using your buttercream, for a smooth finish on your cake. The ideal texture is slightly firm but silky smooth – LIKE THIS – if you leave it mixing too long it may get overly soft and runny, especially in summer, so keep an eye on it. <3

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