Caramel Apple Salad

1 container (8-oz) frozen whipped topping, thawed
1 pkg. dry instant butterscotch pudding
1 can (8-oz) crushed pineapple with juice
3 cups diced apples
1 cup dry roasted nuts
1 cup marshmallows

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Mix cool whip, butterscotch pudding and crushed pineapple with juice.  Add apples, roasted nuts and marshmallows. Keep in refrigerator until ready to serve.