Using cookie crumbs is a great way to make a crust for pies and cheesecakes, without all the work of making a dough; plus these cookie crusts are easily pressed in the pan, no rolling out required. In this recipe, it's used as the base for a coconut pudding filling that's thickened with gelatin and made with coconut milk and sweetened shredded coconut. The dessert needs to be chilled for at least four hours before serving, with mango puree on top.