Considering all the "fun stuff" you use in making coffee ice cream, have you ever experimented with something as simplistic as Medaglia d'Oro instant coffee as a flavor booster?
Or a coffee liqueur?
With all due respect, you understand, all these steps necessary in preparing what must be delicious coffee ice cream (my fave) wold send me rushing to the nearest ice cream shoppe for a pint of their's! Or Il Lab...