Ingredients

  1. 6 large egg whites

  2. 1 2/3 cups caster sugar (310g)

  3. ¾ tsp (3g) salt

  4. ¼ tsp cream of tartar

  5. 565g unsalted butter, softened

  6. Queen Mermaid Magic Flavour for Icing

  7. Queen Blue Food Colour Gel

  8. Queen Green Food Colour Gel

Method

  1. 1

    Fill a pot with at least 4cm of water. Use a thick ring of foil to prevent bowl from touching bottom. Bring to a boil, then adjust temperature to a gentle simmer.

  2. 2

    Combine egg whites, sugar, salt and cream of tartar in bowl of a stand mixer. Set over simmering water, stirring and scraping constantly with a spatula, until egg whites hold steady at 80°C – approx. 10-12 minutes

  3. 3

    Once ready, transfer to stand mixer fitted with a whisk attachment and whip at high speed for 10 minutes, until meringue is glossy, stiff, and cool - around 32°C.

  4. 4

    With mixer still running, add butter, 1 - 2 tablespoons at a time. Volume will initially decrease, but as cool butter is added, it will begin to thicken and cool. Buttercream should become thick, creamy, and soft around 22°C.

  5. 5

    Add Mermaid Magic and Food Colour Gel until desired shade is reached.

Troubleshooting: If warmer than 23°C, buttercream will be soft and loose; chill for 15 minutes and re-whip to help thicken and cool. If colder than 20°C, buttercream will be firm and dense, making it difficult to spread; to warm, briefly set over a pan of steaming water until edges melt slightly, then re-whip to help soften and warm.

 

This recipe is part of our Buttercream Masterclass tutorial. Click here for more recipes, tips and tricks!

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