Raspberry jam

I always freeze the fruit for jams . If you use fruit for jam from fresh you have to add water and heat it to get the juices flow before adding the sugar them boil it.

I found doing that years ago it spoilt the taste and look of the jam. In the summer I buy the strawberries when cheaper then freeze. But I also use ready frozen fruits from supermarkets.
I put the frozen fruit into my preserving pan with 2 bottle of lemon juice and leave overnight to defrost. Do not add any water there is enough liquid from the defrosted fruit to make the jam . Add equal amount of jam sugar to the fruit . ie 1 kilo fruit 1 kilo jam sugar . Bring to the boil stirring all the time then boil to setting point. You only boil the fruit once tastes better and retains the colour .

Yes, you can make jam with frozen fruit, my late MiL used to freeze a glut of raspberries and made jam in the winter.

Thanks all. Would using frozen raspberries work!

I make my own jams so it's always seeds in. Life is to sort to sieve them out. Also they are part of a raspberry . I never look at jams so never noticed . Will look next time I go shopping .

Sainsbury’s have a few and Asda.

Waitrose own brand do a raspberry preserve which has seeds, and is delicious - I’ve got some in my fridge.

And also a Tiptree one

Waitrose Duchy Organic do a nice Raspberry with seeds.

I love Lidl's raspberry jam, seeds and all, Auntieflo.