This Keto Cauliflower soup can be made in advance and it can be kept for up to three days in the fridge in an airtight container, and it can be frozen for up to 4 weeks. Then, defrost and reheat before serving. If the soup looks separated after defrosting, add a blender and puree back into a smooth consistency. Once the soup cools down, transfer it into freezer-resistant containers or Ziploc freezer bags. Label the bags and then lay them in the freezer. Store the soup in the freezer for four weeks. Just an important note here. Add dairy (cream or milk) just before serving. This is because soup with dairy does not freeze well.