Tex-Mex (was "The sky is the limit" ...)

[Sam Clements]

Bethany K. Dumas  asks:

So when is Tex-Mex first attested? I heard it as a child in se TX. -
probably late 1940s, though I have no record. Could have been as late as the
1950s.

OED cites Time magazine from 1949 with "Texmex" referring to language.  I
think the cooking usage appears ca. 1960.  But Barry would know that.

SC