The filling gets a pumpkin pie-like cure, with brown sugar and vanilla to get a deep caramel taste and butter and eggs for richness. This recipe is sure to become a holiday staple. This tends to make them very easy to fill without crumbling. A simple recipe such as this https://food-arts-sa-argentina20741.kylieblog.com/40041113/the-2-minute-rule-for-food-arts-sa-argentina