This section is from the book "The Complete Cook", by J. M. Sanderson. Also available from Amazon: The Complete Cook.
Take ripe raspberries, press the juice from half of them, and put the pulp back with the others; reduce them on the fire. To each pound of pulp add two pounds of loaf sugar in powder; put it again on the fire, stirring it constantly until it is evaporated to a very thick paste. Have a tin ring, with a handle by the side, about the size of an old penny piece, and twice the thickness; wet the ring, and place it on your small pewter or tin plates, fill it with the paste,smoothing over the top with a knife; then remove the ring, and the cake will remain. Lay them off in rows, and make three or four marks on the top with the handle of a table spoon; put them in the stove to dry, turn them with a thin knife, and put them again in the stove to dry perfectly. Place them in boxes, with paper between each layer.
The residue from the making of raspberry vinegar may be employed for this purpose, or they may be made by adding a pound of fine powdered sugar to a pound of jam. Any of the fruit pastes may be formed into cakes like these, or into drops, by forcing them out on paper with a small pipe and bladder attached to it.
 
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