This buttercream icing is smooth, fluffy and ready in 5 minutes, with the Thermomix doing all the work. What I love about this recipe is that it uses chilled butter instead of butter softened to room temperature. The blades of the Thermomix do the softening for you, so there's no planning ahead needed. It's the icing I always reach for when I make my Thermomix vanilla cupcakes.

This is a classic buttercream, ideal for both cakes and cupcakes. If you're after something less sweet, try my Thermomix cream cheese icing. For a chocolate version, my Thermomix chocolate buttercream icing uses the same method.
Here's a Look at the Ingredients

These photos are intended to give you a helpful visual overview of the recipe. You'll find the full ingredient list, exact quantities and detailed instructions in the printable recipe card at the bottom of this post.
Visual Step-by-Step Guide

- Soften the butter in the Thermomix.

- 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, vanilla extract and milk and mix until smooth and fluffy.
Buttercream Icing Tips
Adding food colouring: Add a few drops of food colouring to the final mix, along with the remaining icing sugar, vanilla extract and milk.
Quantity: One batch generously covers 18 cupcakes or a 22-24cm round cake.
Doubling the recipe: Make two separate batches rather than doubling the quantities, as the bowl isn't large enough for a double batch.
⭐️ Did you make this Buttercream Icing? I'd love to hear what you think - please leave a comment and recipe rating below! You can also subscribe to my email list to never miss a new Thermomix recipe.
📖 Recipe

Thermomix Buttercream Icing
Ingredients
- 150 g unsalted butter chilled and cubed
- 340 g icing sugar see notes
- ¼ teaspoon vanilla extract
- 1 tablespoon milk
Instructions
- Add the butter to the Thermomix and mix for 40 sec/speed 5 to soften it.
- Insert the butterfly whisk, add half the icing sugar and mix for 25 sec/speed 3.5. Scrape down the sides of the bowl.
- Add the remaining icing sugar, vanilla extract and 1 tablespoon of milk and mix for 20 sec/speed 3. Scrape down the sides of the bowl then mix again for 5 sec/speed 3.
- Remove the butterfly whisk and give the buttercream a quick stir with a spatula to mix in any last bits.






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