1 (3 3/4 oz.) pkg. pistachio pudding
1 (9 oz.) carton Cool Whip
1 (#2) can crushed pineapple, drained
2 c. sm. marshmallows
1/2 c. chopped nuts

Mix pudding according to package directions. Add pineapple, Cool Whip, marshmallows and nuts. Freeze in 9 x 13 inch pan.