Apple Custard Crumble Jars (Gluten Free) This autumn parfait is absolutely divine! To me fall apples are the most delicious. The balance between the sweetness and juicy tartness of an apple is delectable; that’s coupled with the smooth richness of the custard, and the crunchy texture of the crumble. I’m not afraid to say this is one of my favorite desserts! The mason jars are so cute, and are the epitome of the warm homey feel this dessert embodies. This recipe serves 4, 8oz.