01 - In a large mixing bowl, combine instant pistachio pudding mix with undrained crushed pineapple. Stir thoroughly until pudding mix completely dissolves.
02 - Fold in mini marshmallows and chopped nuts if using. Distribute evenly throughout mixture.
03 - Gently fold thawed whipped topping into mixture until fully combined. Maintain light, fluffy texture by mixing with care.
04 - Cover bowl and refrigerate minimum 1 hour before serving. This allows flavors to meld and marshmallows to soften properly.
05 - Just before serving, top with extra whipped topping, maraschino cherries, and additional chopped nuts as desired.