Pistachio Salad

1 (20 oz.) can of crushed pineapple, drained
1 (8 oz.) container cool whip
1 (3.4 oz.) package pistachio pudding mix
1 1/2 cups miniature marshmallows

In a bowl, add cool whip and dry pistachio pudding mix. Mix until well blended. Then add pineapple  and mix well. If you like really soft marshmallows add them at this point, if you like more firm marshmallows, mix in just before serving. Refrigerate for at least 1 hour before serving.