This recipe makes 4 cups of frosting, which is enough to frost 16-24 cupcakes depending on how generously they are frosted. It’s also enough to cover one 9×13 inch cake, a two layer 8 or 9 inch cake.
Make sure that you start with room-temperature butterfor the best results. Do not attempt to make this with cold butter as it won’t mix properly with the sugar and will curdle and separate.
Use high-quality white chocolate bars. White chocolate chips don’t melt very well, and might affect the texture of the frosting. If you want use chocolate chips, I recommend going for a premium brand like Ghirardelli.
To avoid air bubbles from forming, avoid using the whisk attachment and use a flat paddle attachment instead.
Scrape down the bowlas needed to make sure that your frosting is well blended.