This instructable shows how to make a variation on traditional Scottish (Dundee) style marmalade from scratch. This is easy to do, and allows you to make it how you like. It also works out quite a bit cheaper than buying it if you are bothered about that.
Note, everyone who makes marmalade will have their own trusted method, and preferred flavour. This one works for me, and is thick, tangy and spicy.
It's probably not as frugal a jam as many others because traditionally it is made from Seville oranges, which are not the sort of fruit that you are likely to have a surplus of. However it is as much fun to do as to eat.
Step 1: Choosing the fruit
Marmalade is traditionally made from Seville oranges. These have a strong sharp taste and are virtually inedible raw, but are very good for marmalade as they are very easy to peel and are high in pectin, the jelly-like fruit protein that causes jam to set. Seville oranges are seasonal and can normally only be obtained for a short time in January and February.
You can also add other types of oranges. This version used seven Seville oranges, three lemons and two grapefruit.