Irresistible butter, heat from Jalapeño. Here’s what happens when you turn up the heat on mouth-watering popcorn – Jalapeño Butter! Every bite delivers melted buttery goodness with a kick of Jalapeño. Your taste buds won’t know what happened. Go on… see if you can beat the heat. Jalapeño Butter. A case contains 12 boxes (each box contains three regular size bags). The cost of a case (12 boxes) is $26.95 plus shipping.