When making custard, it is often served with raspberry sauce to add a naturally sour flavor to the rather artificially sweet taste of the pudding.
However, if you have a 75 g bag of dried cranberry fruits left over, you can stir it into the pudding while preparing it, making the industrial pudding tastier.
If you want to try it without the ready-mixed mixture: stir the sugar and 2 heaped tablespoons of cornstarch in 100 ml of cold milk until smooth and heat the remaining 400 ml of milk with the scraped-out pulp of a vanilla pod and the enclosed pod. Before stirring in the starch mixture, remove the pod again and prepare a real pudding.