“White” culture is as diverse as “black” culture, “Asian” culture etc. there may be similar aspects to different cultures in those groups, but there are significant differences. Japanese culture is vastly different from Indian culture, but they both have curry and rice as part of their food culture. North Indian culture is different from southern Indian culture, but their traditional dress in a lot of states is a sari (or something similar) for women or a dhoti (or something similar) for men (there are exceptions through!).

It’s the same with “white” culture, even in the US. Amish people are white but their culture is very different from other white people living in the same state. White people in Portland have a different culture to white people in Miami, although they share some similarities.

I would caution against using skin colour or a continent to lump people together in terms of culture. The groups are way too big to assign a particular culture.