I made rum balls for the first time this year and love them. Great keepers, better as they age. I used a recipe that had vanilla wafers, icing sugar, toasted pecans, melted chocolate and rum. I think it’s an easy recipe for substitutions as they don’t need to be baked. As long as you have them sweet enough and enough liquid to bind them they should be fine with whatever you want to use for the cookie crumbs and flavours to meld with them. I’m going to try shortbread cookies, white chocolate, walnuts, crystallized ginger and some ginger liqueur next.