Line a brownie pan with parchment paper
Place the pitted dates, coconut oil, vanilla extract, and cocoa powder into a food processor. Process until sticky paste forms and all the dates are puréed, around a minute.
Transfer the mixture to a large bowl and add the buckinis and nuts. Mix using your hands until everything is combined. Transfer the date mixture to the brownie pan and press down to desired thickness, but don’t make it too thin.
Pop into the freezer to set a little while you melt the chocolate in the next step.