1. Prepare the Filling: In a large mixing bowl, use an electric mixer to beat the softened cream cheese until it’s velvety smooth. Gradually add the sweetened condensed milk, mixing continuously until everything is well combined and creamy. Now, stir in the thawed lemonade concentrate and lemon zest if you choose to use it, ensuring that the mixture is completely blended and silky.

2. Fold in the Whipped Topping: Gently incorporate the thawed whipped topping into the lemon cream cheese mixture. Use a spatula to fold it in carefully—this will keep your filling light and airy, so avoid overmixing.

3. Assemble the Pie: Spoon the luscious lemon cream cheese filling into the prepared graham cracker crust. Use a spatula to spread it evenly and beautifully—this is your masterpiece, after all!

4. Chill: Cover the pie with plastic wrap and refrigerate for at least 4 hours. For the best results (and maximum deliciousness), let it chill overnight to ensure the filling sets up perfectly.

5. Serve: When you’re ready to enjoy, remove the pie from the refrigerator. Add a generous dollop of whipped topping and garnish it with lemon slices for a cheerful presentation.

6. Enjoy: Now it’s time for the best part! Slice yourself a piece of this cool, creamy, and zesty lemonade pie, and savor every mouthful.