Babka is truly best right after baking! However, leftovers can be stored at room temperature for 3-4 days and it truly is best enjoyed warm. Babka can also be pre-sliced and frozen in a closed container between layers of parchment paper for up to 1 month. Allow to defrost at room temperature and then warm up in the microwave or oven to enjoy! The one thing I do not recommend is storing this babka in the fridge. It really dries it out and will go stale much faster.