Marmalade made with sweet oranges!

[BML]

Our local supermarket placed servile oranges next to desert ones and they became mixed. As a result the marmalade my wife made is not setting and tastes unlike proper marmalade. is there any way to save the batch?

 

[CraigC]

Can you reheat it and add more sour orange peel and juice?

 

[BML]

Totally bereft at such a failure she dumped it possibly having learnt to check the oranges better next time.