Dreamy Creamsicle Pie

Bahan-bahan (8 porsi)

• 3.4 ounces orange Jell-O (4 serving size)
• 8 ounces whipped topping (such as Cool Whip, divided)
• 2 teaspoons orange extract
• 1 tablespoon orange zest (about 1 orange, optional but recommended)
• ⅔ cup boiling water
• ½ cup ice
• 1 g raham cracker crust
• mandarin orange slices (for garnish, optional)