Swiss Meringue Buttercream

The method's theirs. Go give them the click.

Ingredients

6 large egg whites (approximately 180g)
2 cups (400g) granulated sugar
1 and 1/2 cups (340g) unsalted butter, softened but still cool and cut into Tbsp size pieces (*see note*)
2 teaspoons pure vanilla extract
1/8 teaspoon salt

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