Marscapone Buttercream - cooking recipe

Ingredients

200 g sugar
150 g egg whites
450 g soft unsalted butter
1 pinch salt
1 teaspoon vanilla
250 g softened mascarpone cheese

Preparation

Place egg whites and sugar in a heat proof bowl and place over a pot of simmering water.
Heat whites while whisking continuously until they are hot and sugar has completely dissolved (or 60*C).
Remove whites from the heat and - using an electric mixer with a whisk attachment - whip on medium high speed until whites are completely cooled and have formed medium stiff peaks.
Add butter in chunks, creaming well between each addition.
When butter is fully used, and the curdled look changes to a smooth satin look, add the marscapone and vanilla, whip until well combined.