Major Robert Rogers' diabetes-inducing rum butter drink

I am particularly enthralled with this country tavern scene early in the movie. The movie's main character and his sidekick buddy find themselves in a country tavern while journeying westward.

Major Rogers is a brusque man, but somehow jolly and gregarious at the same time which makes his rough-edged character likeable. Major Rogers offers to buy the two men a rum drink and he keeps his promise. But what a promise.

Major Rogers orders a series of ingredients from the tavern keeper/bartender and proceeds to mix his own devastating, pancreas-killing drink.

Rogers empties a flagon of rum into a much larger flagon. Then he adds a pitcher of hot water. Next Rogers scoops in a huge chunk of butter, already soft at room temperature. Finally Rogers spoons into the mixing flagon, heaping teaspoons of brown sugar. The hot water is necessary to 'cut' the rum but more, to dissolve the brown sugar and butter. When Rogers pours the liquid into drinking cups, it flows out a golden, transparent, butterscotch color and probably tasted like warm, liquid butterscotch.

I wondered how anyone could stomach such intensely sugary liquid without getting ill. Sure it must have tasted good, like liquid butterscotch, but the excessive richness would make anyone queasy.