Impressive lists and it seemed like everything was covered but I did not find the following:

Lacy Dalton - Black Coffee
Bill Haley - Forty Cups of Coffee
fiddle tune - Sugar in the Coffee
Gene Autry, Red Foley, Lulu Belle & others - Methodist Pie
Guy Clark - Instant Coffee Blues
Merle Travis - Too Much Sugar for a Dime
Baxter Black - A Vegetarian's Nightmare or a Dissertation on Plant's Rights (poem)

Baxter Black