I made this recipe in the crock pot yesterday. It turned out well.
2 1/2 cups cooked white rice
1 1/2 cups evaporated milk or scalded milk
3 tbsp butter
2 tbsp butter
1/2 cup raisins (I omitted)
1/3 cups sugar
Combine in the slow cooker on low for around 2 hours. Add more milk if needed.
I got the recipe out of the Fix it and forget it cookbook (may want to verify amounts).