No Bake Pistachio Icebox Cake

Bahan-bahan (9 porsi)

• 18 g raham crackers
• 2 boxes instant pistachio pudding mix (3.4 ounces each, 4 servings each)
• 2 ¼ cups cold milk
• 8 ounces whipped topping
• chopped pistachios (for decorating, optional)