Place the butter and icing sugar into the bowl of your Thermomix and mix for 2 minutes, Speed 3.
Scrape down the sides and mix for a further 1 minute, Speed 3.
Scrape down the sides of your Thermomix bowl and add the vanilla extract and milk before mixing for 1 minute, Speed 3.
RECIPE NOTES & TIPS
Butter - choose salted or unsalted butter for this recipe. Chop the butter into cubes before placing into the Thermomix.
Icing Sugar - choose pure icing sugar (not icing sugar mixture) as it sets firmer - making it perfect for lunch boxes and birthday parties.
Milk - choose full fat or light milk.
Vanilla Extract - or vanilla bean paste.
Quantity - This Thermomix Buttercream recipe makes enough to generously cover one 20cm round cake or 12 cupcakes.
Coloured buttercream - For coloured buttercream, simply add a couple of drops of food colouring during Step 3.
Storing - Buttercream can be stored in an airtight container in the fridge for up to 2 weeks. Once your cake has been iced, you can store it at room temperature in an airtight container for up to 3 days.