
In the bowl of a stand mixer fitted with the paddle attachment, add the sugar and butter. Mix on low speed until well blended and then increase the speed to medium and beat for another 3 minutes.
Add the salt, vanilla, and cream and beat on medium speed for 1 minute, adding more cream if needed.
Transfer to an airtight container and store in the fridge for up to a week or in the freezer for up to 3 months. Let come to room temperature and re-whip in the stand mixer until light and fluffy again. Add a tablespoon or 2 of powdered sugar if it needs to thicken.