If you don’t have access to it, I have seen some recipes working with toasted and crushed filo pastry and digestive biscuits – but this isn't going to provide you with that crunchy texture you predict On this chocolate bar. Employing a pistachio butter/paste more than a spread is best https://sergioohxlr.blazingblog.com/33219496/5-tips-about-fix-pistachio-chocolate-you-can-use-today