Technically, it's possible, though I usually don't since it's so easy to prepare in just minutes. If you'd like to freeze the sauce, though, you can do so in an airtight container or Ziplock/Stasher bag (with headspace) for 2-3 months. Allow it to thaw in the fridge overnight, then reheat, whisking very well and adding a splash of extra plant-based milk if necessary.