Combine your graham cracker crumbs with the melted butter in a small bowl. Stir well until all the crumbs are evenly coated – this ensures a perfect, sturdy crust!
Press the buttery crumb mixture firmly and evenly into the bottom and slightly up the sides of a 9-inch pie pan. This will be your delicious no-bake foundation.
In a large mixing bowl, beat the softened cream cheese with a hand mixer until it's wonderfully smooth and fluffy. Aim for no lumps to achieve a silky filling.
Pour in the sweetened condensed milk and the vibrant key lime juice. Mix gently with the hand mixer until everything is just combined and smooth. Be careful not to overmix!
Carefully pour the creamy key lime filling over your prepared graham cracker crust, spreading it evenly.
Place the pie in the refrigerator to chill and set for at least 1 hour, or preferably overnight, for the best firm texture.
Before serving, decorate your refreshing pie with fresh key lime slices and a dollop of light whipped cream. Enjoy your easy, healthy, homemade treat!