01 - Place chocolate cookies in a food processor and pulse until coarse crumbs form. Alternatively, seal cookies in a plastic bag and crush with a rolling pin until evenly broken down.
02 - Transfer crumbs to a mixing bowl. Pour melted butter over crumbs and mix thoroughly until evenly coated and texture resembles wet sand.
03 - Fold in any desired add-ins such as chopped dark chocolate, toasted nuts, or sea salt. Mix until evenly distributed throughout the crumble mixture.
04 - Sprinkle generously over ice cream, yogurt, pies, or puddings. Store leftovers in an airtight container at room temperature for up to 3 days.