For best results, weigh the sliced white bread. If you do not have a scale, then look at the package the bread came in to find out the weight of the full loaf. For instance, if your loaf of bread weighs 1 pound 8 ounces (24 ounces total) and it has 24 slices, then each slice weighs 1 ounce. From there it is easy to determine how many slices of bread to add. The budin de pan con caramelo can be refrigerated for up to 3 days.