In a medium mixing bowl, whisk together the sugar, butter, half and half, eggs, cinnamon, vanilla extract, crushed pineapple, and raisins. Pour the mixture onto the stale donut pieces and mix together well.
1 cup granulated sugar, 4 tbsp salted butter, 2 cups half and half, 2 tsp vanilla extract, 2 tsp ground cinnamon, 1 8 oz can crushed pineapple, drained, ½ cup raisins, 2 large eggs