Spread this creamy frosting on cakes, cupcakes, or cookies, or use it to pipe beautiful designs. It starts out white, but you can use food coloring to create a rainbow of frosting colors!
In bowl of stand mixer (or large bowl if using handheld mixer), combine softened butter, cream, vanilla, and salt. Lock bowl into place and attach paddle to stand mixer, if using.
Start mixer on medium speed and beat until smooth, about 1 minute. Stop mixer. Use rubber spatula to scrape down sides of bowl.