I prefer to measure powders by mass, liquids by volume. Butter is weird, since it's a solid but has a pretty consistent density, so it's easy to just cut off th

I prefer to measure powders by mass, liquids by volume. Butter is weird, since it's a solid but has a pretty consistent density, so it's easy to just cut off the amount needed. It's very rare that a precise amount of butter is necessary, so it's faster to use volume for it than it is to shave off slices onto a scale.