In the US we have "whipped butter" which (according to Wikipedia) is made spreadable by aerating it with nitrogen. I recall hearing that it isn't suitable for s

In the US we have "whipped butter" which (according to Wikipedia) is made spreadable by aerating it with nitrogen. I recall hearing that it isn't suitable for situations that require measuring because the volume is not the same. (But it does works well on bread or for greasing a pan.)