Luby's Cafeteria Carrot Salad

1. 2 lbs carrots, peeled and shredded
2. 1 cup drained pineapple chunks or crushed pineapple
3. 1 cup mayonnaise
4. 1 cup raisins, plumped in water and drained
5. 1/4-1/2 cup powdered sugar

Combine all ingredients, mix well and chill.