White chocolate tea is seldom drunk now, but cocoa butter, sugar, milk and vanilla ("white chocolate") mixed with hot tea was once popular. It is being revived by some health nuts who think "white chocolate" lacks the "bad effects" of sugar.

Doubtful is white tea (quite expensive), sold by better tea purveyors. This tea is composed of the white, silvery downy buds plus the tightly whorled leaves that have not yet turned green. Some of the "organic" people consider it has beneficial medicinal properties.

Powdered Chalk was once used as a medicine for stomach disorders.

These ideas may be wrong as far as the ballad verse is concerned- they are guesses at the meaning based on actual recipes.

I won't guess at the "burning forfeit."