For those of you who make traditional marmalade with Seville (bitter) oranges, what is the typical ratio of fruit to sugar? I made a batch last year using 6 oranges and 1.7 kg of sugar but forgot to weigh the oranges. I want to use a similar recipe with kumquats, but now I don't know how much sugar to use. I am guessing 1 kg of bitter oranges/kumquats to 1 kg sugar. Does that sound about right?
Thanks!