Beat softened butter in a large bowl until smooth, light, and creamy.
Add powdered sugar 1 cup at a time, mixing on low and scraping the bowl between each addition.
Beat until fully incorporated and fluffy.
Mix in the vanilla bean paste (or extract) and a pinch of salt until smooth.
Adjust Consistency:
Add heavy cream 1 tablespoon at a time until your desired texture is reached—light, creamy, and spreadable.