Preheat an oven to 325°F. Lightly butter a large baking pan.
Drain the raisins and place in a large mixing bowl. Add all the remaining ingredients and mix well until well combined.
Pour the mixture into the prepared pan and bake for about 25 to 30 minutes. Transfer the pan to a wire rack and let cool for about 15 minutes, then release the pan sides and slide the cake onto a serving plate. Serve warm or cold.