1 (3 oz.) pkg. instant pistachio pudding
1 (20 oz.) can crushed pineapple (undrained)
1/2 c. miniature marshmallows
1/2 c. nuts, chopped
1 (4 oz.) carton Cool Whip

Pour dry pudding mix over undrained pineapple, then mix. Add marshmallows and nuts. Slowly fold in Cool Whip. Refrigerate 3 to 4 hours.