Tried it one evening when I only had a mezcal available; do not attempt this at home! Ugh. Round two was with vodka, of which I just for some reason do not like the taste - but the drink was much better. Next time, it will be with a reposado. Taste as you add the coffee liqueur - watching for too much. Your pineapple juice needs to offset the coffee just right. If the pineapple was not giving you STRONG flavored juice, go easy on the coffee liqueur.