Replying to @user5304716528538 how to make the silkiest Italian meringue buttercream 200g sugar 50g caster sugar 4 large egg whites 1/4 tsp salt 1/4 tsp cream of tartar 450g unsalted butter Flavouring of choice #italianmeringuebuttercream #italianmeringue #buttercream #makewithme #replytocomments #cakemaking #howto #smeg #standmixer #recipe