In a large mixing bowl, combine the softened cream cheese, Greek yogurt, powdered sugar, and vanilla extract. Using an electric mixer, beat the mixture on medium speed until it becomes smooth, creamy, and fully blended.
In a separate bowl, pour the chilled heavy whipping cream. Using a whisk or an electric mixer, whip the cream on high speed until stiff peaks form.
Carefully fold the whipped heavy cream into the cream cheese mixture using a spatula or large spoon.
In a different bowl, combine the graham cracker crumbs with the melted butter. Stir until the crumbs are evenly coated.
Start building your jars by adding a generous layer of the graham cracker mixture to the bottom of each jar. Press it down gently.
Spoon the cheesecake filling over the graham cracker layer in each jar. Smooth the top with the back of a spoon.
Sprinkle a layer of mixed berries over the cheesecake filling.
Continue layering with the remaining graham cracker mixture, followed by the cheesecake filling, until the jars are filled.
Cover the jars with lids or plastic wrap and refrigerate for at least 2 hours.
Just before serving, garnish each jar with a sprinkle of fresh berries and a mint leaf if you choose.
Notes
For an inviting display, arrange the jars on a decorative platter and provide a spoon alongside each.