Combine the raisins with sugar, water, shortening and spices and simmer for a minute. Cool to room temperature.
Preheat the oven to 300 degrees. Lightly grease a 9inch square baking pan. Combine cooled raisin mixture with flour and nuts. Transfer to baking pan and bake 1 hour or until a toothpick when inserted in the center comes out dry. Cool in pan and cut into squares.