Why is this recipe crowned the best vanilla buttercream frosting? With its powerfully decadent vanilla bean flavor and delightfully creamy texture, your family and friends will scrape every last bit of this frosting off their plates. —Margaret Knoebel, Milwaukee, Wisconsin
In a microwave, melt baking chips with the cream until smooth, stirring every 30 seconds. Stir in vanilla paste and extract. Set aside to cool slightly. Meanwhile, in a heatproof bowl of a stand mixer, whisk egg whites, sugar, cream of tartar and salt until blended. Place over simmering water in a large saucepan over medium heat. Whisking constantly, heat mixture until a thermometer reads 160°, 8-10 minutes.
Remove from heat. With whisk attachment of stand mixer, beat on high speed until cooled to 90°, about 7 minutes. Gradually beat in butter, a few tablespoons at a time, on medium speed until smooth. Beat in cooled baking chip mixture until blended.