Yes, you can freeze sour cream. Freezing will cause the proteins in the cream to break down and form curds, so it's not ideal for recipes that call for sour cream. However, it's a good option for making a large batch of sour cream ahead of time or for using in baking recipes that don't require the cream to be whipped. Just make sure to thaw it completely before using and stir well to recombine the curds.