Grease a 13 x 9-inch baking dish with butter.
In a large bowl, combine the melted butter and cream cheese together. Add sugar, vanilla, eggs, and milk, and whisk until smooth. Add noodles (and optional raisins) and stir to combine.
Pour into prepared baking dish, cover and refrigerate all day or overnight.
When ready to bake, preheat the oven to 350 F degrees. Uncover kugel and sprinkle with cornflake crumbs (and optional cinnamon-sugar.) Bake for 1 hour and 15 minutes, until golden and set.