Blackberry mush

Put your fruit in a preserving kettle, mash it to a pulp, with sugar enough to make it quite sweet. Set it over the fire, and, as soon as it begins to simmer, stir in very gradually two teaspoonsful of your to a quart of fruit. It should be stirred all the time it is boiling. Serve it either warm or cold, with cream.

Raspberries may be cooked in the same way.

see Wikipedia Cookbook