This is the best smooth and fluffy Thermomix buttercream made in less than five minutes. Use it for piping, spreading or sandwiching cake layers together.

Making Buttercream in the Thermomix is a great way to save time. You don't have to leave the butter out at room temperature to soften - the Thermomix blades soften it in 40 seconds.
If you're after an icing that's a little less sweet, I have a recipe for Thermomix cream cheese icing.
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Why You'll Love This Recipe
- This recipe makes enough buttercream to ice 12-18 cupcakes or a 20 cm - 24 cm cake.
- Any leftovers can be kept in the fridge for a week or frozen for 3 months.
- Buttercream can be used for piping on cakes, cupcakes and biscuits.
Recipe Ingredients

Note: The full quantities are shown in the recipe card below.
- Butter - use chilled unsalted butter straight from the fridge, as the Thermomix softens it.
- Icing sugar - to make your own icing sugar, see my blog post on how to make Thermomix icing sugar.
- Milk - either light milk or whole milk for added creaminess.
Step-by-Step Directions
Note: This is a summary of the instructions. The full ingredients and instructions are shown in the recipe card below.

Step 1
Add the cubed butter to the Thermomix bowl.

Step 2
Mix until smooth and creamy.

Step 3
Insert the butterfly whisk, add half the icing sugar, and mix until the icing sugar is incorporated into the butter. Add the remaining icing sugar and the milk and mix until smooth and fluffy.
Storage
Buttercream keeps well when stored in an airtight container in the fridge for up to one week. If you plan to use it sooner, it can be kept at a cool room temperature for up to one day.
Buttercream can also be frozen for up to three months. Thaw overnight in the fridge, then bring to room temperature and re-whip before using.
📖 Recipe

Thermomix Buttercream Icing
Ingredients
- 200 g unsalted butter, chilled and roughly cubed
- 400 g icing sugar
- 2 tablespoons milk, light or full cream milk
Instructions
- Add the butter to the Thermomix bowl and mix for 40 sec/speed 5 until soft. Scrape down the sides of the Thermomix bowl with a spatula.
- Insert the butterfly whisk: Add half of the icing sugar to the softened butter and whip for 1 min/speed 3.
- Scrape down the sides of the Thermomix bowl, add the remaining icing sugar and 2 tablespoons of milk, and mix for 1 min/speed 3 until smooth and creamy.






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